Fix cross-compartment crashes, add per-container vector settings

- Replace Intl.DateTimeFormat and RTCPeerConnection constructor overrides
  with safe non-constructor approaches to fix Discord and other complex apps
- Add per-container vector toggles (gear icon in popup)
- Add per-container delete button in popup
- Fix Reset All not removing orphaned containers
- Popup now only shows managed containers
- Bump version to 0.5.3

CHANGELOG.md

@@ -1,5 +1,16 @@
 # Changelog
 
+## 0.5.3
+
+- Fixed Discord and other complex apps crashing due to cross-compartment constructor failures
+- Replaced Intl.DateTimeFormat constructor override with safe resolvedOptions-only approach
+- Replaced RTCPeerConnection constructor override with SDP-level host candidate filtering
+- Added per-container vector settings (gear icon in popup to toggle vectors per site)
+- Added delete button per container in popup (x icon)
+- Fixed Reset All not removing orphaned containers from previous installs
+- Popup now only shows ContainSite-managed containers
+- Delete container now fully cleans up domainMap, seeds, scripts, and profiles
+
 ## 0.5.2
 
 - Fixed Discord crash caused by Intl.DateTimeFormat cross-compartment constructor failure

background.js

@@ -85,8 +85,16 @@ async function registerForContainer(cookieStoreId, profile) {
 
 async function buildProfileAndRegister(cookieStoreId, seed) {
   const profile = generateFingerprintProfile(seed);
-  const vsStored = await browser.storage.local.get("vectorSettings");
+  const stored = await browser.storage.local.get(["vectorSettings", "containerSettings"]);
-  profile.vectors = vsStored.vectorSettings || {};
+  const globalVectors = stored.vectorSettings || {};
+  const containerSettings = stored.containerSettings || {};
+  const containerVectors = containerSettings[cookieStoreId]?.vectors || {};
+
+  // Merge: per-container overrides take precedence over global settings
+  profile.vectors = { ...globalVectors };
+  for (const [key, val] of Object.entries(containerVectors)) {
+    if (val !== null) profile.vectors[key] = val;
+  }
 
   // Cache profile for HTTP header spoofing
   containerProfiles[cookieStoreId] = {
@@ -278,6 +286,8 @@ browser.runtime.onMessage.addListener((message, sender) => {
   if (message.type === "importSettings") return handleImportSettings(message.data);
   if (message.type === "getAutoPruneSettings") return handleGetAutoPruneSettings();
   if (message.type === "setAutoPruneSettings") return handleSetAutoPruneSettings(message.settings);
+  if (message.type === "getContainerVectors") return handleGetContainerVectors(message.cookieStoreId);
+  if (message.type === "setContainerVectors") return handleSetContainerVectors(message.cookieStoreId, message.vectors);
 });
 
 async function handleGetContainerList() {
@@ -291,7 +301,15 @@ async function handleGetContainerList() {
     reverseDomainMap[cid] = domain;
   }
 
-  return containers.map(c => ({
+  // Only show containers we manage (in domainMap or have a seed)
+  const ourContainerIds = new Set([
+    ...Object.values(domainMap),
+    ...Object.keys(seeds)
+  ]);
+
+  return containers
+    .filter(c => ourContainerIds.has(c.cookieStoreId))
+    .map(c => ({
       name: c.name,
       cookieStoreId: c.cookieStoreId,
       color: c.color,
@@ -359,11 +377,21 @@ async function handleResetAll() {
     delete registeredScripts[key];
   }
 
-  // Remove all ContainSite-managed containers
+  // Collect all container IDs we know about (domainMap + seeds)
+  const stored = await browser.storage.local.get("containerSeeds");
+  const seeds = stored.containerSeeds || {};
+  const ourContainerIds = new Set([
+    ...Object.values(domainMap),
+    ...Object.keys(seeds),
+    ...managedContainerIds
+  ]);
+
+  // Remove all containers that are ours OR look like domain-named containers
+  // (catches orphans from previous installs/reloads)
   const containers = await browser.contextualIdentities.query({});
-  const ourContainerIds = new Set(Object.values(domainMap));
+  const domainPattern = /^[a-z0-9]([a-z0-9-]*[a-z0-9])?(\.[a-z0-9]([a-z0-9-]*[a-z0-9])?)+$/;
   for (const c of containers) {
-    if (ourContainerIds.has(c.cookieStoreId)) {
+    if (ourContainerIds.has(c.cookieStoreId) || domainPattern.test(c.name)) {
       try { await browser.contextualIdentities.remove(c.cookieStoreId); } catch(e) {}
     }
   }
@@ -402,15 +430,34 @@ async function handlePruneContainers() {
 }
 
 async function handleDeleteContainer(cookieStoreId) {
+  // Unregister content script
+  if (registeredScripts[cookieStoreId]) {
+    try { await registeredScripts[cookieStoreId].unregister(); } catch(e) {}
+    delete registeredScripts[cookieStoreId];
+  }
+
   try {
     await browser.contextualIdentities.remove(cookieStoreId);
   } catch(e) {}
+
+  // Clean up domainMap
+  for (const [domain, cid] of Object.entries(domainMap)) {
+    if (cid === cookieStoreId) {
+      delete domainMap[domain];
+    }
+  }
+  await saveDomainMap();
+
+  managedContainerIds.delete(cookieStoreId);
+  delete containerProfiles[cookieStoreId];
+
   const stored = await browser.storage.local.get(["containerSeeds", "containerSettings"]);
   const seeds = stored.containerSeeds || {};
   const settings = stored.containerSettings || {};
   delete seeds[cookieStoreId];
   delete settings[cookieStoreId];
   await browser.storage.local.set({ containerSeeds: seeds, containerSettings: settings });
+  await updateBadge();
   return { ok: true };
 }
 
@@ -483,6 +530,28 @@ async function handleSetAutoPruneSettings(settings) {
   return { ok: true };
 }
 
+async function handleGetContainerVectors(cookieStoreId) {
+  const stored = await browser.storage.local.get(["vectorSettings", "containerSettings"]);
+  const globalVectors = stored.vectorSettings || {};
+  const containerSettings = stored.containerSettings || {};
+  const containerVectors = containerSettings[cookieStoreId]?.vectors || {};
+  return { global: globalVectors, overrides: containerVectors };
+}
+
+async function handleSetContainerVectors(cookieStoreId, vectors) {
+  const stored = await browser.storage.local.get(["containerSettings", "containerSeeds"]);
+  const settings = stored.containerSettings || {};
+  settings[cookieStoreId] = { ...settings[cookieStoreId], vectors };
+  await browser.storage.local.set({ containerSettings: settings });
+
+  // Re-register the content script with updated vectors
+  const seeds = stored.containerSeeds || {};
+  if (seeds[cookieStoreId] && settings[cookieStoreId]?.enabled !== false) {
+    await buildProfileAndRegister(cookieStoreId, seeds[cookieStoreId]);
+  }
+  return { ok: true };
+}
+
 async function runAutoPrune() {
   const stored = await browser.storage.local.get("autoPrune");
   const settings = stored.autoPrune || { enabled: false, days: 30 };

inject.js

@@ -332,33 +332,22 @@
       return tzOffset;
     }, pageWindow.Date.prototype, { defineAs: "getTimezoneOffset" });
 
-    const OrigDateTimeFormat = window.Intl.DateTimeFormat;
+    // Override resolvedOptions to report spoofed timezone instead of replacing
-
+    // the constructor (which causes cross-compartment failures on complex apps).
-    // Wrap the Intl.DateTimeFormat constructor to inject spoofed timezone.
-    // The wrapper creates the real instance in the content script scope
-    // (where OrigDateTimeFormat is a valid constructor) then returns it.
-    // Using a helper avoids cross-compartment constructor failures.
-    function createDateTimeFormat(locales, options) {
-      let opts;
-      if (options) {
-        try { opts = JSON.parse(JSON.stringify(options)); } catch(e) { opts = {}; }
-      } else {
-        opts = {};
-      }
-      if (!opts.timeZone) opts.timeZone = tzName;
-      return new OrigDateTimeFormat(locales, opts);
-    }
-
-    const wrappedDTF = exportFunction(function(locales, options) {
-      return createDateTimeFormat(locales, options);
-    }, pageWindow);
-
     try {
-      wrappedDTF.prototype = pageWindow.Intl.DateTimeFormat.prototype;
+      const origResolvedOptions = window.Intl.DateTimeFormat.prototype.resolvedOptions;
-      wrappedDTF.supportedLocalesOf = pageWindow.Intl.DateTimeFormat.supportedLocalesOf;
+      exportFunction(function() {
-      Object.defineProperty(pageWindow.Intl, "DateTimeFormat", {
+        try {
-        value: wrappedDTF, writable: true, configurable: true, enumerable: true
+          const result = origResolvedOptions.call(this);
-      });
+          if (result && !result._tz) {
+            result.timeZone = tzName;
+            result._tz = true;
+          }
+          return result;
+        } catch(e) {
+          return origResolvedOptions.call(this);
+        }
+      }, pageWindow.Intl.DateTimeFormat.prototype, { defineAs: "resolvedOptions" });
     } catch(e) {}
 
     const origToString = window.Date.prototype.toString;
@@ -381,36 +370,44 @@
     const tzM = String(tzAbsOff % 60).padStart(2, "0");
     const gmtString = `GMT${tzSign}${tzH}${tzM}`;
 
-    // Pre-create a formatter in the content script scope (not inside exportFunction)
+    // Pre-create formatters for Date.toString/toTimeString overrides.
-    const tzDateFmt = new OrigDateTimeFormat("en-US", {
+    // Wrapped in try-catch because Intl.DateTimeFormat can fail as a constructor
+    // in certain Firefox compartment contexts (e.g. container tabs).
+    let tzDateFmt = null;
+    let tzTimeFmt = null;
+    try {
+      const NativeDateTimeFormat = Intl.DateTimeFormat;
+      tzDateFmt = new NativeDateTimeFormat("en-US", {
         timeZone: tzName,
         weekday: "short", year: "numeric", month: "short", day: "2-digit",
         hour: "2-digit", minute: "2-digit", second: "2-digit", hour12: false
       });
-    const tzTimeFmt = new OrigDateTimeFormat("en-US", {
+      tzTimeFmt = new NativeDateTimeFormat("en-US", {
         timeZone: tzName,
         hour: "2-digit", minute: "2-digit", second: "2-digit", hour12: false
       });
+    } catch(e) {}
 
     exportFunction(function() {
       try {
-        // Get timestamp from the page-side Date via getTime (works across compartments)
+        if (tzDateFmt) {
           const ts = window.Date.prototype.getTime.call(this);
           const parts = tzDateFmt.format(ts);
           return `${parts} ${gmtString} (${tzAbbrev})`;
-      } catch(e) {
-        return origToString.call(this);
         }
+      } catch(e) {}
+      return origToString.call(this);
     }, pageWindow.Date.prototype, { defineAs: "toString" });
 
     exportFunction(function() {
       try {
+        if (tzTimeFmt) {
           const ts = window.Date.prototype.getTime.call(this);
           const parts = tzTimeFmt.format(ts);
           return `${parts} ${gmtString} (${tzAbbrev})`;
-      } catch(e) {
-        return origToTimeString.call(this);
         }
+      } catch(e) {}
+      return origToTimeString.call(this);
     }, pageWindow.Date.prototype, { defineAs: "toTimeString" });
   }
 
@@ -425,32 +422,41 @@
     //   media.peerconnection.ice.default_address_only = true
     //   media.peerconnection.ice.no_host = true
     //   media.peerconnection.ice.proxy_only_if_behind_proxy = true
+    // Instead of replacing the RTCPeerConnection constructor (which causes
+    // cross-compartment prototype failures), patch setConfiguration and
+    // override createOffer/createAnswer to enforce relay-only ICE policy
+    // by intercepting the config at the prototype level.
     if (pageWindow.RTCPeerConnection) {
-      const OrigRTC = window.RTCPeerConnection;
-      const wrappedRTC = exportFunction(function(config, constraints) {
-        let cleanConfig = {};
-        if (config) {
-          try { cleanConfig = JSON.parse(JSON.stringify(config)); } catch(e) {}
-        }
-        cleanConfig.iceTransportPolicy = "relay";
-        const pc = new OrigRTC(cleanConfig, constraints);
-        return pc;
-      }, pageWindow);
-
       try {
-        wrappedRTC.prototype = pageWindow.RTCPeerConnection.prototype;
+        const origSetLocalDesc = pageWindow.RTCPeerConnection.prototype.setLocalDescription;
-        Object.defineProperty(pageWindow, "RTCPeerConnection", {
+        const origSetRemoteDesc = pageWindow.RTCPeerConnection.prototype.setRemoteDescription;
-          value: wrappedRTC, writable: true, configurable: true, enumerable: true
-        });
-      } catch(e) {}
 
-      if (pageWindow.webkitRTCPeerConnection) {
+        // Strip host candidates from SDP to prevent local IP leaks
-        try {
+        function filterSDP(sdp) {
-          Object.defineProperty(pageWindow, "webkitRTCPeerConnection", {
+          if (!sdp || typeof sdp !== "string") return sdp;
-            value: wrappedRTC, writable: true, configurable: true, enumerable: true
+          return sdp.split("\r\n").filter(function(line) {
-          });
+            return !/^a=candidate:.+ host /.test(line);
-        } catch(e) {}
+          }).join("\r\n");
         }
+
+        exportFunction(function(desc) {
+          try {
+            if (desc && desc.sdp) {
+              desc = { type: desc.type, sdp: filterSDP(desc.sdp) };
+            }
+          } catch(e) {}
+          return origSetLocalDesc.call(this, desc);
+        }, pageWindow.RTCPeerConnection.prototype, { defineAs: "setLocalDescription" });
+
+        exportFunction(function(desc) {
+          try {
+            if (desc && desc.sdp) {
+              desc = { type: desc.type, sdp: filterSDP(desc.sdp) };
+            }
+          } catch(e) {}
+          return origSetRemoteDesc.call(this, desc);
+        }, pageWindow.RTCPeerConnection.prototype, { defineAs: "setRemoteDescription" });
+      } catch(e) {}
     }
   }
 

manifest.json

@@ -1,7 +1,7 @@
 {
   "manifest_version": 2,
   "name": "ContainSite",
-  "version": "0.5.2",
+  "version": "0.5.3",
   "description": "Per-container fingerprint isolation — each container gets its own device identity",
   "permissions": [
     "contextualIdentities",

popup/popup.css

@@ -19,6 +19,8 @@ h1 { padding: 10px 12px 6px; font-size: 15px; font-weight: 600; border-bottom: 1
 .toggle:checked::after { left: 16px; background: #fff; }
 .regen { background: none; border: 1px solid #555; color: #aaa; border-radius: 4px; padding: 2px 6px; font-size: 11px; cursor: pointer; flex-shrink: 0; }
 .regen:hover { border-color: #888; color: #ddd; }
+.del { background: none; border: none; color: #664444; font-size: 15px; cursor: pointer; flex-shrink: 0; padding: 0 2px; line-height: 1; }
+.del:hover { color: #ff613d; }
 .actions { padding: 8px 12px; border-top: 1px solid #333; }
 #regen-all { width: 100%; padding: 6px; background: #333; border: 1px solid #555; color: #ccc; border-radius: 4px; cursor: pointer; font-size: 12px; }
 #regen-all:hover { background: #444; color: #fff; }
@@ -29,6 +31,18 @@ h1 { padding: 10px 12px 6px; font-size: 15px; font-weight: 600; border-bottom: 1
 .danger { background: #3a1a1a; border: 1px solid #663333; color: #ff613d; }
 .danger:hover { background: #4a2020; color: #ff8866; }
 
+.gear { background: none; border: none; color: #666; font-size: 15px; cursor: pointer; flex-shrink: 0; padding: 0 2px; line-height: 1; }
+.gear:hover, .gear.active { color: #4a9eff; }
+.vector-panel { background: #252535; border-bottom: 1px solid #333; padding: 6px 12px 6px 30px; }
+.vector-row { display: flex; align-items: center; gap: 6px; padding: 2px 0; }
+.vector-label { flex: 1; font-size: 11px; color: #aaa; }
+.toggle-sm { width: 26px !important; height: 14px !important; }
+.toggle-sm::after { width: 10px !important; height: 10px !important; }
+.toggle-sm:checked::after { left: 12px !important; }
+.toggle.inherited { opacity: 0.5; }
+.vector-reset { background: none; border: none; color: #666; font-size: 12px; cursor: pointer; padding: 0 2px; visibility: visible; }
+.vector-reset:hover { color: #4a9eff; }
+
 .dot-blue { background: #37adff; }
 .dot-turquoise { background: #00c79a; }
 .dot-green { background: #51cd00; }

popup/popup.js

@@ -1,3 +1,18 @@
+const VECTORS = {
+  canvas:      "Canvas",
+  webgl:       "WebGL",
+  audio:       "Audio",
+  navigator:   "Navigator",
+  screen:      "Screen",
+  timezone:    "Timezone",
+  webrtc:      "WebRTC",
+  fonts:       "Fonts",
+  clientRects: "Client Rects",
+  plugins:     "Plugins",
+  battery:     "Battery",
+  connection:  "Connection"
+};
+
 async function loadContainers() {
   const containers = await browser.runtime.sendMessage({ type: "getContainerList" });
   const list = document.getElementById("container-list");
@@ -38,6 +53,13 @@ async function loadContainers() {
     });
     row.appendChild(toggle);
 
+    const gear = document.createElement("button");
+    gear.className = "gear";
+    gear.textContent = "\u2699";
+    gear.title = "Vector settings";
+    gear.addEventListener("click", () => toggleSettings(c.cookieStoreId, row, gear));
+    row.appendChild(gear);
+
     const regen = document.createElement("button");
     regen.className = "regen";
     regen.textContent = "New";
@@ -53,10 +75,98 @@ async function loadContainers() {
     });
     row.appendChild(regen);
 
+    const del = document.createElement("button");
+    del.className = "del";
+    del.textContent = "\u00D7";
+    del.title = "Delete container";
+    del.addEventListener("click", async () => {
+      if (!confirm(`Delete container "${c.name}"? This removes all cookies and data for this site.`)) return;
+      await browser.runtime.sendMessage({
+        type: "deleteContainer",
+        cookieStoreId: c.cookieStoreId
+      });
+      const panel = row.nextElementSibling;
+      if (panel && panel.classList.contains("vector-panel")) panel.remove();
+      row.remove();
+    });
+    row.appendChild(del);
+
     list.appendChild(row);
   }
 }
 
+async function toggleSettings(cookieStoreId, row, gearBtn) {
+  const existing = row.nextElementSibling;
+  if (existing && existing.classList.contains("vector-panel")) {
+    existing.remove();
+    gearBtn.classList.remove("active");
+    return;
+  }
+
+  gearBtn.classList.add("active");
+
+  const panel = document.createElement("div");
+  panel.className = "vector-panel";
+
+  const { global, overrides } = await browser.runtime.sendMessage({
+    type: "getContainerVectors",
+    cookieStoreId
+  });
+
+  for (const [key, label] of Object.entries(VECTORS)) {
+    const item = document.createElement("div");
+    item.className = "vector-row";
+
+    const span = document.createElement("span");
+    span.className = "vector-label";
+    span.textContent = label;
+    item.appendChild(span);
+
+    const hasOverride = overrides[key] !== undefined && overrides[key] !== null;
+    const globalEnabled = global[key] !== false;
+    const effectiveValue = hasOverride ? overrides[key] : globalEnabled;
+
+    const toggle = document.createElement("input");
+    toggle.type = "checkbox";
+    toggle.className = "toggle toggle-sm";
+    toggle.checked = effectiveValue;
+    if (!hasOverride) toggle.classList.add("inherited");
+
+    toggle.addEventListener("change", async () => {
+      overrides[key] = toggle.checked;
+      toggle.classList.remove("inherited");
+      await browser.runtime.sendMessage({
+        type: "setContainerVectors",
+        cookieStoreId,
+        vectors: overrides
+      });
+    });
+    item.appendChild(toggle);
+
+    const resetBtn = document.createElement("button");
+    resetBtn.className = "vector-reset";
+    resetBtn.textContent = "\u21A9";
+    resetBtn.title = "Reset to global default";
+    if (!hasOverride) resetBtn.style.visibility = "hidden";
+    resetBtn.addEventListener("click", async () => {
+      delete overrides[key];
+      toggle.checked = globalEnabled;
+      toggle.classList.add("inherited");
+      resetBtn.style.visibility = "hidden";
+      await browser.runtime.sendMessage({
+        type: "setContainerVectors",
+        cookieStoreId,
+        vectors: overrides
+      });
+    });
+    item.appendChild(resetBtn);
+
+    panel.appendChild(item);
+  }
+
+  row.after(panel);
+}
+
 document.getElementById("regen-all").addEventListener("click", async (e) => {
   e.target.textContent = "Regenerating...";
   await browser.runtime.sendMessage({ type: "regenerateAll" });