test: cover the address-poisoning filters in transactions.js (closes #160)

src/shared/transactions.js had zero test coverage despite owning the four
anti-poisoning filters that README.md:730-814 documents as a core security
property: known token symbol verification, the 1,000-holder rule, the fraud
contract blocklist, and the dust threshold. A regression in any of them does
not crash, it just silently stops filtering, so the behaviour needs pinning
down in both directions.

Adds tests/transactions.test.js with fixtures built from the two real attacks
cited in the README: the fake "Ethereum"/"ETH" token at 0xD05339f9 with zero
holders, and the 1 gwei native dust transfer 0x2708ebdd from the look-alike
sender 0xC3c6B3b4. Every filter is proven to work when on and to be bypassed
when off, both thresholds are asserted at, just below, and just above their
boundary, and legitimate traffic (a plain ETH transfer and genuine USDC and
WETH transfers) is proven to survive all four rules.

Also covers the per-address merge and dedup that fetchRecentTransactions owns,
with debugFetch mocked at the module boundary. No test performs a network
request: global.fetch is a throwing stub and is asserted never to have been
called.

Several tests are named as documenting current behaviour where it diverges
from the README; no source file is modified here.

.dockerignore

@@ -1,4 +1,3 @@
-.git
 node_modules
 .DS_Store
 dist

TODO.md

@@ -23,6 +23,8 @@ get review, merge to main.
 
 # Completed Steps
 
+- 2026-08-09: Test coverage for the address-poisoning defense in
+  `src/shared/transactions.js` (#160)
 - 2026-07-07 Adopted scripts-to-rule-them-all: `script/` entrypoints, Makefile
   shims, README Entrypoints section
 - 2026-03-01: About well in settings with build info and easter egg (in flight

build.js

@@ -11,9 +11,51 @@ function ensureDir(dir) {
     fs.mkdirSync(dir, { recursive: true });
 }
 
+function getBuildInfo() {
+    const pkg = JSON.parse(
+        fs.readFileSync(path.join(__dirname, "package.json"), "utf8"),
+    );
+    let commitHash = "unknown";
+    try {
+        commitHash = execSync("git rev-parse --short HEAD", {
+            encoding: "utf8",
+        }).trim();
+    } catch (_) {
+        // not a git repo or git not available
+    }
+    let commitHashFull = "unknown";
+    try {
+        commitHashFull = execSync("git rev-parse HEAD", {
+            encoding: "utf8",
+        }).trim();
+    } catch (_) {
+        // not a git repo or git not available
+    }
+    return {
+        version: pkg.version,
+        license: pkg.license,
+        author: pkg.author,
+        commitHash,
+        commitHashFull,
+        buildDate: new Date().toISOString().slice(0, 10),
+    };
+}
+
 async function build() {
     console.log("Building AutistMask extension...");
 
+    const buildInfo = getBuildInfo();
+    console.log("Build info:", buildInfo);
+
+    const define = {
+        __BUILD_VERSION__: JSON.stringify(buildInfo.version),
+        __BUILD_LICENSE__: JSON.stringify(buildInfo.license),
+        __BUILD_AUTHOR__: JSON.stringify(buildInfo.author),
+        __BUILD_COMMIT__: JSON.stringify(buildInfo.commitHash),
+        __BUILD_COMMIT_FULL__: JSON.stringify(buildInfo.commitHashFull),
+        __BUILD_DATE__: JSON.stringify(buildInfo.buildDate),
+    };
+
     // compile tailwind CSS
     console.log("Compiling Tailwind CSS...");
     const tailwindInput = path.join(SRC, "popup", "styles", "main.css");
@@ -38,6 +80,7 @@ async function build() {
             platform: "browser",
             target: ["chrome110", "firefox110"],
             minify: true,
+            define,
         });
 
         // bundle background script
@@ -49,6 +92,7 @@ async function build() {
             platform: "browser",
             target: ["chrome110", "firefox110"],
             minify: true,
+            define,
         });
 
         // bundle content script
@@ -60,6 +104,7 @@ async function build() {
             platform: "browser",
             target: ["chrome110", "firefox110"],
             minify: true,
+            define,
         });
 
         // bundle inpage script (injected into page context, separate file)
@@ -71,6 +116,7 @@ async function build() {
             platform: "browser",
             target: ["chrome110", "firefox110"],
             minify: true,
+            define,
         });
 
         // copy popup HTML

scripts/apply-enrichment.mjs

@@ -1,161 +0,0 @@
-#!/usr/bin/env node
-// Apply enrichment data to tokenList.js: add name + url fields to each token.
-
-import { readFileSync, writeFileSync } from "fs";
-
-const enrichment = JSON.parse(
-    readFileSync("scripts/token-enrichment.json", "utf8"),
-);
-
-// Well-known URLs for major tokens not in ethereum-lists.
-// These are official project websites verified from public sources.
-const EXTRA_URLS = {
-    "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2": "https://weth.io",
-    "0xdAC17F958D2ee523a2206206994597C13D831ec7": "https://tether.to",
-    "0xB8c77482e45F1F44dE1745F52C74426C631bDD52": "https://www.bnbchain.org",
-    "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48": "https://www.circle.com/usdc",
-    "0xdC035D45d973E3EC169d2276DDab16f1e407384F": "https://sky.money",
-    "0x2AF5D2aD76741191D15Dfe7bF6aC92d4Bd912Ca3": "https://www.bitfinex.com",
-    "0x514910771AF9Ca656af840dff83E8264EcF986CA": "https://chain.link",
-    "0x4c9EDD5852cd905f086C759E8383e09bff1E68B3": "https://ethena.fi",
-    "0x8d0D000Ee44948FC98c9B98A4FA4921476f08B0d":
-        "https://www.worldlibertyfinancial.com",
-    "0x6B175474E89094C44Da98b954EedeAC495271d0F": "https://makerdao.com",
-    "0x6c3ea9036406852006290770BEdFcAbA0e23A0e8":
-        "https://www.paypal.com/us/digital-wallet/manage-money/crypto/pyusd",
-    "0x95aD61b0a150d79219dCF64E1E6Cc01f0B64C4cE": "https://shibatoken.com",
-    "0xdA5e1988097297dCdc1f90D4dFE7909e847CBeF6":
-        "https://www.worldlibertyfinancial.com",
-    "0xA0b73E1Ff0B80914AB6fe0444E65848C4C34450b": "https://crypto.com",
-    "0x582d872A1B094FC48F5DE31D3B73F2D9bE47def1": "https://ton.org",
-    "0x68749665FF8D2d112Fa859AA293F07A622782F38": "https://gold.tether.to",
-    "0x196C20DA81Fbc324EcdF55501e95Ce9f0bD84d14": "https://polkadot.network",
-    "0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984": "https://uniswap.org",
-    "0x45804880De22913dAFE09f4980848ECE6EcbAf78":
-        "https://www.paxos.com/paxgold",
-    "0x3c3a81e81dc49A522A592e7622A7E711c06bf354": "https://www.mantle.xyz",
-    "0x7Fc66500c84A76Ad7e9c93437bFc5Ac33E2DDaE9": "https://aave.com",
-    "0x75231F58b43240C9718Dd58B4967c5114342a86c": "https://www.okx.com",
-    "0x6982508145454Ce325dDbE47a25d4ec3d2311933": "https://www.pepe.vip",
-    "0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599": "https://wbtc.network",
-    "0xae7ab96520DE3A18E5e111B5EaAb095312D7fE84": "https://lido.fi",
-    "0x5A98FcBEA516Cf06857215779Fd812CA3beF1B32": "https://lido.fi",
-    "0xC18360217D8F7Ab5e7c516566761Ea12Ce7F9D72": "https://ens.domains",
-    "0x7D1AfA7B718fb893dB30A3aBc0Cfc608AaCfeBB0": "https://polygon.technology",
-    "0x9f8F72aA9304c8B593d555F12eF6589cC3A579A2": "https://makerdao.com",
-    "0xD533a949740bb3306d119CC777fa900bA034cd52": "https://curve.fi",
-    "0x111111111117dC0aa78b770fA6A738034120C302": "https://1inch.io",
-    "0x163f8C2467924be0ae7B5347228CABF260318753": "https://worldcoin.org",
-    "0xba100000625a3754423978a60c9317c58a424e3D": "https://balancer.fi",
-    "0xC011a73ee8576Fb46F5E1c5751cA3B9Fe0af2a6F": "https://synthetix.io",
-    "0x1a7e4e63778B4f12a199C062f3eFdD288afCBce8": "https://www.euler.finance",
-    "0xBBbbCA6A901c926F240b89EacB641d8Aec7AEafD": "https://loopring.org",
-    "0xC669928185DbCE49d2230CC9B0979BE6DC797957": "https://bitstable.finance",
-    "0x7f39C581F595B53c5cb19bD0b3f8dA6c935E2Ca0": "https://lido.fi",
-    "0xBe9895146f7AF43049ca1c1AE358B0541Ea49704":
-        "https://www.coinbase.com/cbeth",
-    "0xfAbA6f8e4a5E8Ab82F62fe7C39859FA577269BE3": "https://ondo.finance",
-    "0x0C10bF8FcB7Bf5412187A595ab97a3609160b5c6": "https://decentraland.org",
-    "0x6De037ef9aD2725EB40118Bb1702EBb27e4Aeb24": "https://www.render.com",
-    "0x4a220E6096B25EADb88358cb44068A3248254675": "https://www.quant.network",
-    "0xba5BDe662c17e2aDFF1075610382B9B691296350": "https://superrare.com",
-    "0x15D4c048F83bd7e37d49eA4C83a07267Ec4203dA": "https://galxe.com",
-    "0xc00e94Cb662C3520282E6f5717214004A7f26888": "https://compound.finance",
-    "0xE41d2489571d322189246DaFA5ebDe1F4699F498": "https://0x.org",
-    "0x0bc529c00C6401aEF6D220BE8C6Ea1667F6Ad93e": "https://yearn.fi",
-    "0x6fB3e0A217407EFFf7Ca062D46c26E5d60a14d69": "https://iotex.io",
-    "0xD31a59c85aE9D8edEFec411D448f90841571b89c": "https://solana.com",
-    "0xa1faa113cbE53436Df28FF0aEe54275c13B40975": "https://alphafinance.io",
-    "0xF57e7e7C23978C3cAEC3C3548E3D615c346e79fF": "https://immutable.com",
-    "0x0f5D2fB29fb7d3CFeE444a200298f468908cC942": "https://decentraland.org",
-    "0x3845badAde8e6dFF049820680d1F14bD3903a5d0": "https://www.sandbox.game",
-    "0x4d224452801ACEd8B2F0aebE155379bb5D594381": "https://apecoin.com",
-    "0x6810e776880C02933D47DB1b9fc05908e5386b96": "https://gnosis.io",
-    "0x5f98805A4E8be255a32880FDeC7F6728C6568bA0": "https://www.liquity.org",
-    "0xd26114cd6EE289AccF82350c8d8487fedB8A0C07": "https://omg.network",
-    "0x0D8775F648430679A709E98d2b0Cb6250d2887EF":
-        "https://basicattentiontoken.org",
-    "0xc944E90C64B2c07662A292be6244BDf05Cda44a7": "https://thegraph.com",
-    "0x1985365e9f78359a9B6AD760e32412f4a445E862": "https://augur.net",
-    "0x4E15361FD6b4BB609Fa63C81A2be19d873717870": "https://fantom.foundation",
-    "0x853d955aCEf822Db058eb8505911ED77F175b99e": "https://frax.finance",
-    "0x0000000000085d4780B73119b644AE5ecd22b376": "https://www.trueusd.com",
-    "0x0cEC1A9154Ff802e7934Fc916Ed7Ca50bDE6844e": "https://polymesh.network",
-    "0x956F47F50A910163D8BF957Cf5846D573E7f87CA": "https://fei.money",
-    "0x3432B6A60D23Ca0dFCa7761B7ab56459D9C964D0": "https://frax.finance",
-    "0xf939E0A03FB07F59A73314E73794Be0E57ac1b4E": "https://curve.fi",
-    "0x0100546F2cD4C9D97f798fFC9755E47865FF7Ee6": "https://alchemix.fi",
-    "0x808507121B80c02388fAd14726482e061B8da827": "https://pendle.finance",
-    "0xCa14007Eff0dB1f8135f4C25B34De49AB0d42766": "https://starknet.io",
-    "0x8457CA5040ad67fdebbCC8EdCE889A335Bc0fbFB": "https://alt.layer",
-    "0x4C19596f5aAfF459fA38B0f7eD92F11AE6543784": "https://www.truflation.com",
-    "0xB50721BCf8d664c30412Cfbc6cf7a15145234ad1": "https://arbitrum.io",
-    "0x912CE59144191C1204E64559FE8253a0e49E6548": "https://arbitrum.io",
-    "0x6985884C4392D348587B19cb9eAAf157F13271cd": "https://layerzero.network",
-    "0xFe0c30065B384F05761f15d0CC899D4F9F9Cc0eB": "https://ethfi.org",
-    "0x18084fbA666a33d37592fA2633fD49a74DD93a88": "https://tbtc.network",
-    "0x9D39A5DE30e57443BfF2A8307A4256c8797A3497": "https://suilend.fi",
-    "0x5283D291DBCF85356A21bA090E6db59121208b44": "https://blur.io",
-    "0x43Dfc4159D86F3A37A5A4B3D4580b888ad7d4DDd": "https://dydx.exchange",
-    "0xCf0C122c6b73ff809C693DB761e7BaeBe62b6a2E": "https://floki.com",
-    "0xe53EC727dbDEB9E2d5456c3be40cFF031AB40A55": "https://superfarm.com",
-    "0x32353A6C91143bfd6C7d363B546e62a9A2489A20": "https://www.agora.finance",
-    "0x1aBaEA1f7C830bD89Acc67eC4af516284b1bC33c": "https://www.euro-coin.com",
-    "0x1a03eF3d1a80b5f214e468ACD97F55714E049393": "https://gemspad.io",
-    "0x7122985656e38BDC0302Db86685bb972b145bD3C": "https://stone.fi",
-    "0xa35923162C49cF95e6BF26623385eb431ad920D3": "https://www.turbo-eth.com",
-    "0xdBdb4d16EdA451D0503b854CF79D55697F90c8DF": "https://alchemix.fi",
-    "0x08c32b0726C5684024ea6e141C50aDe9690bBdcc": "https://stratis.io",
-    "0x65Ef703f5594D2573eb71Aaf55BC0CB548492df4": "https://multichain.org",
-    "0x1151CB3d861920e07a38e03eEAd12C32178567F6": "https://bonk.com",
-    "0x090185f2135308BaD17527004364eBcC2D37e5F6": "https://spell.club",
-    "0xAf5191B0De278C7286d6C7CC6ab6BB8A73bA2Cd6": "https://stargate.finance",
-};
-
-// Apply extra URLs where enrichment has none
-for (const [addr, url] of Object.entries(EXTRA_URLS)) {
-    const e = enrichment[addr];
-    if (e && !e.url) {
-        e.url = url;
-    }
-}
-
-// Read original tokenList.js
-const original = readFileSync("src/shared/tokenList.js", "utf8");
-
-// Replace each token block: add name and url after decimals
-let result = original;
-let replacements = 0;
-
-for (const [addr, data] of Object.entries(enrichment)) {
-    // Escape special regex characters in the address
-    const escaped = addr.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
-
-    // Match the token block: { address: "...", symbol: "...", decimals: N, }
-    // The closing }, may have trailing whitespace
-    const blockRe = new RegExp(
-        `(\\{\\s*address:\\s*"${escaped}",\\s*symbol:\\s*"[^"]+",\\s*decimals:\\s*\\d+),?(\\s*\\})`,
-    );
-
-    const match = result.match(blockRe);
-    if (!match) {
-        console.error(`WARNING: Could not find block for ${addr}`);
-        continue;
-    }
-
-    // Build replacement: original fields + name + url
-    const nameEscaped = data.name.replace(/\\/g, "\\\\").replace(/"/g, '\\"');
-    const urlEscaped = data.url.replace(/\\/g, "\\\\").replace(/"/g, '\\"');
-    const replacement =
-        match[1] +
-        `,\n        name: "${nameEscaped}",` +
-        `\n        url: "${urlEscaped}",` +
-        match[2];
-
-    result = result.replace(blockRe, replacement);
-    replacements++;
-}
-
-console.error(`Applied ${replacements} enrichments to tokenList.js`);
-writeFileSync("src/shared/tokenList.js", result);
-console.error("Done!");

scripts/enrich-tokens.mjs

@@ -1,87 +0,0 @@
-#!/usr/bin/env node
-// Temporary script: fetch name + homepage URL for every token in tokenList.js
-// Phase 1: CoinGecko /coins/list (1 bulk call) for names — gets 100%
-// Phase 2: ethereum-lists GitHub repo for project URLs — gets ~15%
-
-import { readFileSync, writeFileSync } from "fs";
-
-const src = readFileSync("src/shared/tokenList.js", "utf8");
-
-const tokens = [];
-const re =
-    /\{\s*address:\s*"(0x[a-fA-F0-9]{40})",\s*symbol:\s*"([^"]+)",\s*decimals:\s*(\d+)/g;
-let m;
-while ((m = re.exec(src)) !== null) {
-    tokens.push({ address: m[1], symbol: m[2], decimals: parseInt(m[3]) });
-}
-console.error(`Parsed ${tokens.length} tokens`);
-
-const sleep = (ms) => new Promise((r) => setTimeout(r, ms));
-
-// --- Phase 1: bulk names from CoinGecko ---
-console.error("Fetching CoinGecko coins list...");
-const listResp = await fetch(
-    "https://api.coingecko.com/api/v3/coins/list?include_platform=true",
-);
-if (!listResp.ok) throw new Error(`CoinGecko list HTTP ${listResp.status}`);
-const coins = await listResp.json();
-
-const addrMap = new Map();
-for (const coin of coins) {
-    const eth = (coin.platforms?.ethereum || "").toLowerCase().trim();
-    if (eth && eth.startsWith("0x")) {
-        addrMap.set(eth, { name: coin.name, id: coin.id });
-    }
-}
-console.error(`CoinGecko map: ${addrMap.size} Ethereum tokens`);
-
-const enriched = new Map();
-for (const t of tokens) {
-    const info = addrMap.get(t.address.toLowerCase());
-    enriched.set(t.address, { name: info?.name || t.symbol, url: "" });
-}
-console.error(
-    `Matched ${[...enriched.values()].filter((e) => e.name).length}/${tokens.length} names`,
-);
-
-// --- Phase 2: ethereum-lists GitHub for URLs ---
-console.error("Fetching URLs from ethereum-lists GitHub...");
-const CONCURRENT = 10;
-let urlsFound = 0;
-
-for (let i = 0; i < tokens.length; i += CONCURRENT) {
-    const batch = tokens.slice(i, i + CONCURRENT);
-    await Promise.allSettled(
-        batch.map(async (t) => {
-            try {
-                const r = await fetch(
-                    `https://raw.githubusercontent.com/ethereum-lists/tokens/master/tokens/eth/${t.address}.json`,
-                );
-                if (!r.ok) return;
-                const data = await r.json();
-                const website = (data.website || "").trim();
-                if (website && website !== "https://") {
-                    enriched.get(t.address).url = website;
-                    urlsFound++;
-                }
-            } catch {
-                // ignore
-            }
-        }),
-    );
-    if (i % 100 === 0) {
-        console.error(
-            `  GitHub: ${Math.min(i + CONCURRENT, tokens.length)}/${tokens.length}, ${urlsFound} URLs`,
-        );
-    }
-    await sleep(200);
-}
-console.error(`Phase 2 done: ${urlsFound} URLs from ethereum-lists`);
-
-// --- Output ---
-const output = {};
-for (const [addr, e] of enriched) {
-    output[addr] = { name: e.name, url: e.url };
-}
-writeFileSync("scripts/token-enrichment.json", JSON.stringify(output, null, 2));
-console.error(`Done! ${tokens.length} names, ${urlsFound} URLs.`);

src/popup/index.html

@@ -1002,6 +1002,64 @@
                     </p>
                     <div id="settings-denied-sites"></div>
                 </div>
+
+                <div class="bg-well p-3 mx-1 mb-3">
+                    <h3 class="font-bold mb-1">About</h3>
+                    <p class="text-xs mb-2">
+                        <a
+                            href="https://git.eeqj.de/sneak/AutistMask"
+                            class="underline decoration-dashed"
+                            target="_blank"
+                            rel="noopener noreferrer"
+                            >AutistMask</a
+                        >
+                        — Minimal Ethereum wallet browser extension.
+                    </p>
+                    <div class="text-xs">
+                        <div class="mb-1">
+                            <span class="text-muted">License:</span>
+                            <span id="about-license"></span>
+                        </div>
+                        <div class="mb-1">
+                            <span class="text-muted">Author:</span>
+                            <span id="about-author"></span>
+                        </div>
+                        <div class="mb-1">
+                            <span class="text-muted">Version:</span>
+                            <span
+                                id="about-version"
+                                class="cursor-pointer select-none"
+                            ></span>
+                        </div>
+                        <div class="mb-1">
+                            <span class="text-muted">Release date:</span>
+                            <span id="about-release-date"></span>
+                        </div>
+                        <div>
+                            <span class="text-muted">Commit:</span>
+                            <a
+                                id="about-commit-link"
+                                class="underline decoration-dashed"
+                                target="_blank"
+                                rel="noopener noreferrer"
+                            ></a>
+                        </div>
+                    </div>
+                </div>
+
+                <div
+                    id="settings-debug-well"
+                    class="bg-well p-3 mx-1 mb-3"
+                    style="display: none"
+                >
+                    <h3 class="font-bold mb-1">Debug</h3>
+                    <label
+                        class="text-xs flex items-center gap-1 cursor-pointer"
+                    >
+                        <input type="checkbox" id="settings-debug-mode" />
+                        Enable debug mode
+                    </label>
+                </div>
             </div>
 
             <!-- ============ DELETE WALLET CONFIRM ============ -->

src/popup/index.js

@@ -1,18 +1,14 @@
 // AutistMask popup entry point.
 // Loads state, initializes views, triggers first render.
 
-const { DEBUG } = require("../shared/constants");
+const { state, saveState, loadState } = require("../shared/state");
-const {
+const { setRuntimeDebug } = require("../shared/log");
-    state,
-    saveState,
-    loadState,
-    currentNetwork,
-} = require("../shared/state");
 const { refreshPrices } = require("../shared/prices");
 const { refreshBalances } = require("../shared/balances");
 const {
     $,
     showView,
+    updateDebugBanner,
     setRenderMain,
     pushCurrentView,
     goBack,
@@ -209,21 +205,11 @@ async function init() {
     await loadState();
     applyTheme(state.theme);
 
-    const net = currentNetwork();
+    // Sync runtime debug flag from persisted state before first render
-    if (DEBUG || net.isTestnet) {
+    setRuntimeDebug(state.debugMode);
-        const banner = document.createElement("div");
+
-        banner.id = "debug-banner";
+    // Create the debug/testnet banner if needed (uses runtime debug state)
-        if (DEBUG && net.isTestnet) {
+    updateDebugBanner();
-            banner.textContent = "DEBUG / INSECURE [TESTNET]";
-        } else if (net.isTestnet) {
-            banner.textContent = "[TESTNET]";
-        } else {
-            banner.textContent = "DEBUG / INSECURE";
-        }
-        banner.style.cssText =
-            "background:#c00;color:#fff;text-align:center;font-size:10px;padding:1px 0;font-family:monospace;position:sticky;top:0;z-index:9999;";
-        document.body.prepend(banner);
-    }
 
     // Auto-default active address
     if (

src/popup/styles/main.css

@@ -10,7 +10,7 @@
     --color-border: #000000;
     --color-border-light: #cccccc;
     --color-hover: #eeeeee;
-    --color-well: #f5f5f5;
+    --color-well: #e8e8e8;
     --color-danger-well: #fef2f2;
     --color-section: #dddddd;
 }

src/popup/views/helpers.js

@@ -1,6 +1,6 @@
 // Shared DOM helpers used by all views.
 
-const { DEBUG } = require("../../shared/constants");
+const { isDebug } = require("../../shared/log");
 const {
     formatUsd,
     getPrice,
@@ -59,19 +59,37 @@ function showView(name) {
     clearFlash();
     state.currentView = name;
     saveState();
+    updateDebugBanner(name);
+}
+
+// Create or update the debug/insecure warning banner.
+// Called on every view switch and after the settings debug toggle changes.
+// The banner is shown when the compile-time DEBUG constant is true OR when
+// the user has enabled runtime debug mode via the settings easter egg, OR
+// when the active network is a testnet.
+function updateDebugBanner(viewName) {
+    const debug = isDebug();
     const net = currentNetwork();
-    if (DEBUG || net.isTestnet) {
+    const show = debug || net.isTestnet;
-        const banner = document.getElementById("debug-banner");
+    let banner = document.getElementById("debug-banner");
-        if (banner) {
+    if (show) {
-            if (DEBUG && net.isTestnet) {
+        if (!banner) {
-                banner.textContent =
+            banner = document.createElement("div");
-                    "DEBUG / INSECURE [TESTNET] (" + name + ")";
+            banner.id = "debug-banner";
-            } else if (net.isTestnet) {
+            banner.style.cssText =
-                banner.textContent = "[TESTNET]";
+                "background:#c00;color:#fff;text-align:center;font-size:10px;padding:1px 0;font-family:monospace;position:sticky;top:0;z-index:9999;";
-            } else {
+            document.body.prepend(banner);
-                banner.textContent = "DEBUG / INSECURE (" + name + ")";
-            }
         }
+        const suffix = viewName ? " (" + viewName + ")" : "";
+        if (debug && net.isTestnet) {
+            banner.textContent = "DEBUG / INSECURE [TESTNET]" + suffix;
+        } else if (net.isTestnet) {
+            banner.textContent = "[TESTNET]" + suffix;
+        } else {
+            banner.textContent = "DEBUG / INSECURE" + suffix;
+        }
+    } else if (banner) {
+        banner.remove();
     }
 }
 
@@ -417,6 +435,7 @@ module.exports = {
     showError,
     hideError,
     showView,
+    updateDebugBanner,
     setRenderMain,
     pushCurrentView,
     goBack,

src/popup/views/settings.js

@@ -1,8 +1,10 @@
 const {
     $,
     showView,
+    updateDebugBanner,
     showFlash,
     escapeHtml,
+    flashCopyFeedback,
     goBack,
     pushCurrentView,
 } = require("./helpers");
@@ -10,12 +12,23 @@ const { applyTheme } = require("../theme");
 const { state, saveState, currentNetwork } = require("../../shared/state");
 const { NETWORKS, SUPPORTED_CHAIN_IDS } = require("../../shared/networks");
 const { onChainSwitch } = require("../../shared/chainSwitch");
-const { log, debugFetch } = require("../../shared/log");
+const { log, debugFetch, setRuntimeDebug } = require("../../shared/log");
 const deleteWallet = require("./deleteWallet");
+const {
+    BUILD_VERSION,
+    BUILD_LICENSE,
+    BUILD_AUTHOR,
+    BUILD_COMMIT,
+    BUILD_DATE,
+    GITEA_COMMIT_URL,
+} = require("../../shared/buildInfo");
 
 const runtime =
     typeof browser !== "undefined" ? browser.runtime : chrome.runtime;
 
+let versionClickCount = 0;
+let versionClickTimer = null;
+
 function renderSiteList(containerId, siteMap, stateKey) {
     const container = $(containerId);
     const hostnames = [...new Set(Object.values(siteMap).flat())];
@@ -142,6 +155,28 @@ function show() {
     renderSiteLists();
     renderWalletListSettings();
 
+    // Populate About well
+    $("about-license").textContent = BUILD_LICENSE;
+    // Show only the name part of the author field (strip email)
+    const authorName = BUILD_AUTHOR.replace(/\s*<[^>]+>/, "");
+    $("about-author").textContent = authorName;
+    $("about-version").textContent = BUILD_VERSION;
+    $("about-release-date").textContent = BUILD_DATE;
+    $("about-commit-link").textContent = BUILD_COMMIT;
+    $("about-commit-link").href = GITEA_COMMIT_URL;
+
+    // Reset version click counter each time settings opens
+    versionClickCount = 0;
+
+    // Show debug well if debug mode is already enabled
+    const debugWell = $("settings-debug-well");
+    if (state.debugMode) {
+        debugWell.style.display = "";
+    } else {
+        debugWell.style.display = "none";
+    }
+    $("settings-debug-mode").checked = state.debugMode;
+
     showView("settings");
 }
 
@@ -289,6 +324,66 @@ function init(ctx) {
         ctx.showSettingsAddTokenView,
     );
 
+    // Bright saturated colors for easter egg flashes (clicks 6–10)
+    const easterEggColors = [
+        "#ff0055", // hot pink
+        "#00cc44", // vivid green
+        "#3366ff", // electric blue
+        "#ff9900", // bright orange
+        "#aa00ff", // vivid purple
+    ];
+
+    // Easter egg: click version 10 times to reveal the debug well.
+    // Each click does a copy-flash animation. After 5 clicks, each
+    // additional click flashes a different bright saturated color.
+    $("about-version").addEventListener("click", () => {
+        versionClickCount++;
+        clearTimeout(versionClickTimer);
+        // Reset counter if user stops clicking for 3 seconds
+        versionClickTimer = setTimeout(() => {
+            versionClickCount = 0;
+        }, 3000);
+
+        const el = $("about-version");
+
+        if (versionClickCount > 5) {
+            // Colored flash for clicks 6–10
+            const colorIdx = versionClickCount - 6;
+            const color = easterEggColors[colorIdx % easterEggColors.length];
+            el.classList.remove("copy-flash-fade");
+            el.style.backgroundColor = color;
+            el.style.color = "#ffffff";
+            setTimeout(() => {
+                el.style.backgroundColor = "";
+                el.style.color = "";
+                el.classList.add("copy-flash-fade");
+                setTimeout(() => {
+                    el.classList.remove("copy-flash-fade");
+                }, 275);
+            }, 75);
+        } else {
+            // Standard copy-flash for clicks 1–5
+            flashCopyFeedback(el);
+        }
+
+        if (versionClickCount >= 10) {
+            versionClickCount = 0;
+            clearTimeout(versionClickTimer);
+            $("settings-debug-well").style.display = "";
+        }
+    });
+
+    // Debug mode toggle — update runtime flag, persist, and re-render banner
+    $("settings-debug-mode").addEventListener("change", async () => {
+        state.debugMode = $("settings-debug-mode").checked;
+        setRuntimeDebug(state.debugMode);
+        await saveState();
+        updateDebugBanner(state.currentView);
+    });
+
+    // Sync runtime debug flag on init
+    setRuntimeDebug(state.debugMode);
+
     $("btn-settings-back").addEventListener("click", () => {
         goBack();
     });

src/shared/buildInfo.js

@@ -0,0 +1,35 @@
+// Build-time constants injected by esbuild define in build.js.
+// These globals are replaced at bundle time with string literals.
+
+/* global __BUILD_VERSION__, __BUILD_LICENSE__, __BUILD_AUTHOR__,
+          __BUILD_COMMIT__, __BUILD_COMMIT_FULL__, __BUILD_DATE__ */
+
+const BUILD_VERSION =
+    typeof __BUILD_VERSION__ !== "undefined" ? __BUILD_VERSION__ : "dev";
+const BUILD_LICENSE =
+    typeof __BUILD_LICENSE__ !== "undefined" ? __BUILD_LICENSE__ : "GPL-3.0";
+const BUILD_AUTHOR =
+    typeof __BUILD_AUTHOR__ !== "undefined"
+        ? __BUILD_AUTHOR__
+        : "sneak <sneak@sneak.berlin>";
+const BUILD_COMMIT =
+    typeof __BUILD_COMMIT__ !== "undefined" ? __BUILD_COMMIT__ : "unknown";
+const BUILD_COMMIT_FULL =
+    typeof __BUILD_COMMIT_FULL__ !== "undefined"
+        ? __BUILD_COMMIT_FULL__
+        : "unknown";
+const BUILD_DATE =
+    typeof __BUILD_DATE__ !== "undefined" ? __BUILD_DATE__ : "unknown";
+
+const GITEA_COMMIT_URL =
+    "https://git.eeqj.de/sneak/AutistMask/commit/" + BUILD_COMMIT_FULL;
+
+module.exports = {
+    BUILD_VERSION,
+    BUILD_LICENSE,
+    BUILD_AUTHOR,
+    BUILD_COMMIT,
+    BUILD_COMMIT_FULL,
+    BUILD_DATE,
+    GITEA_COMMIT_URL,
+};

src/shared/log.js

@@ -1,12 +1,27 @@
 // Leveled logger. Outputs to console with [AutistMask] prefix.
-// Level is DEBUG when the DEBUG constant is true, INFO otherwise.
+// Level is DEBUG when the compile-time DEBUG constant is true or the runtime
+// debugMode state flag is enabled.  The runtime flag is checked lazily so it
+// responds immediately when toggled in settings.
 
 const { DEBUG } = require("./constants");
 
 const LEVELS = { debug: 0, info: 1, warn: 2, error: 3 };
-const threshold = DEBUG ? LEVELS.debug : LEVELS.info;
+
+// Runtime debug mode flag — set by settings.js when the user toggles debug
+// mode via the easter egg.  Kept here as a simple mutable reference so it can
+// be updated without circular dependency issues with state.js.
+let _runtimeDebug = false;
+
+function setRuntimeDebug(enabled) {
+    _runtimeDebug = enabled;
+}
+
+function isDebug() {
+    return DEBUG || _runtimeDebug;
+}
 
 function emit(level, method, args) {
+    const threshold = isDebug() ? LEVELS.debug : LEVELS.info;
     if (LEVELS[level] >= threshold) {
         console[method]("[AutistMask]", ...args);
     }
@@ -37,4 +52,4 @@ async function debugFetch(url, opts) {
     return resp;
 }
 
-module.exports = { log, debugFetch };
+module.exports = { log, debugFetch, setRuntimeDebug, isDebug };

src/shared/state.js

@@ -29,6 +29,7 @@ const DEFAULT_STATE = {
     fraudContracts: [],
     tokenHolderCache: {},
     theme: "system",
+    debugMode: false,
 };
 
 const state = {
@@ -68,6 +69,7 @@ async function saveState() {
         fraudContracts: state.fraudContracts,
         tokenHolderCache: state.tokenHolderCache,
         theme: state.theme,
+        debugMode: state.debugMode,
         currentView: state.currentView,
         selectedWallet: state.selectedWallet,
         selectedAddress: state.selectedAddress,
@@ -128,6 +130,8 @@ async function loadState() {
         state.fraudContracts = saved.fraudContracts || [];
         state.tokenHolderCache = saved.tokenHolderCache || {};
         state.theme = saved.theme || "system";
+        state.debugMode =
+            saved.debugMode !== undefined ? saved.debugMode : false;
         state.currentView = saved.currentView || null;
         state.selectedWallet =
             saved.selectedWallet !== undefined ? saved.selectedWallet : null;