diff --git a/README.md b/README.md
index 205b23a..8abbc61 100644
--- a/README.md
+++ b/README.md
@@ -156,7 +156,7 @@ The manifest includes stable Firefox extension metadata and references the packa
 1. Start the backend locally.
 2. Open Firefox and visit `about:debugging#/runtime/this-firefox`.
 3. Select **Load Temporary Add-on**.
-4. Choose `webextension/manifest.json`.
+4. Choose `webextension/manifest.json` (Firefox 142 or newer is required).
 5. Open the LinkLog extension options and enter:
   - Backend URL: the URL of your LinkLog server, such as `http://localhost:8000`
   - Email: `alice@example.com`
diff --git a/VIBE/CHAT_LOG.md b/VIBE/CHAT_LOG.md
index ae33075..30f02b3 100644
--- a/VIBE/CHAT_LOG.md
+++ b/VIBE/CHAT_LOG.md
@@ -1,5 +1,11 @@
 # Chat Log
 
+### User
+The Firefox plugin tests report that `strict_min_version` 112 is too low for `data_collection_permissions`, `storage.session`, and `permissions.request`.
+
+### Assistant outcome
+Raised the extension minimum Firefox version to 142.0, covering the reported desktop and Android manifest/API compatibility warnings. Updated the README to require Firefox 142 or newer.
+
 ### User
 Implement SA-005: during startup reject missing or known development `LINKLOG_SECRET_KEY` in production, validate minimum length and entropy, require and validate the encryption key, and add fail-closed configuration tests.
 
diff --git a/VIBE/PROMPTS.md b/VIBE/PROMPTS.md
index d8080c9..3c177cb 100644
--- a/VIBE/PROMPTS.md
+++ b/VIBE/PROMPTS.md
@@ -203,6 +203,7 @@
 196. Remedy SA-001: migrate logout from JSON token transport to the Authorization bearer header.
 197. Implement SA-002: replace raw infrastructure errors with redacted server-side logging, request IDs, and stable public reference messages.
 198. Implement SA-005: reject missing/default/weak production secrets at startup and validate the Fernet encryption key, with configuration tests.
+199. Fix Firefox manifest compatibility warnings by aligning the minimum version with data collection permissions and session storage support.
 
 ## Future entries
 
diff --git a/XPI/unsigned/LinkLog-0.1.0.xpi b/XPI/unsigned/LinkLog-0.1.0.xpi
index a6196d2..22d374b 100644
Binary files a/XPI/unsigned/LinkLog-0.1.0.xpi and b/XPI/unsigned/LinkLog-0.1.0.xpi differ
diff --git a/webextension/manifest.json b/webextension/manifest.json
index 8503fe8..d4de332 100644
--- a/webextension/manifest.json
+++ b/webextension/manifest.json
@@ -30,7 +30,7 @@
   "browser_specific_settings": {
       "gecko": {
         "id": "linklog@kolkman.org",
-        "strict_min_version": "112.0",
+        "strict_min_version": "142.0",
         "data_collection_permissions": {
           "required": ["websiteActivity"],
           "optional": []