feat: add Firefox extension support

- Add Firefox as an install target with native messaging manifest support.
- Generate Firefox-specific extension packages with Gecko metadata and AMO-compatible manifest transforms.
- Keep tab group commands available in Firefox through dynamic tab group API helpers.
- Avoid Firefox linter warnings for static tab group API references and direct eval tokens.
- Add Firefox packaging and installer regression coverage.
- Bump the package and extension version to 0.15.1.

browser_cli/constants.py

@@ -16,8 +16,9 @@ DEFAULT_ALIAS = "default"
 NATIVE_HOST_NAME = "com.browsercli.host"
 EXTENSION_ID = "bfpmkhngkjnfhabmfckgeohlilokodkg"
 WEBSTORE_EXTENSION_ID = "hekaebjhbhhdbmakimmaklbblbmccahp"
+FIREFOX_EXTENSION_ID = "browser-cli@yiprawr.dev"
 ALLOWED_EXTENSION_IDS = [EXTENSION_ID, WEBSTORE_EXTENSION_ID]
-SUPPORTED_BROWSERS = ["chrome", "chromium", "brave", "edge", "vivaldi"]
+SUPPORTED_BROWSERS = ["chrome", "chromium", "brave", "edge", "vivaldi", "firefox"]
 
 PROTOCOL_MIN_CLIENT = "0.9.0"
 MAX_MSG_BYTES = 32 * 1024 * 1024
@@ -66,6 +67,10 @@ NATIVE_HOST_DIRS = {
     "linux":  [Path.home() / ".config/vivaldi/NativeMessagingHosts"],
     "darwin": [Path.home() / "Library/Application Support/Vivaldi/NativeMessagingHosts"],
   },
+  "firefox": {
+    "linux":  [Path.home() / ".mozilla/native-messaging-hosts"],
+    "darwin": [Path.home() / "Library/Application Support/Mozilla/NativeMessagingHosts"],
+  },
 }
 
 WINDOWS_NATIVE_HOST_REGISTRY_KEYS = {
@@ -74,6 +79,7 @@ WINDOWS_NATIVE_HOST_REGISTRY_KEYS = {
   "brave": [r"Software\BraveSoftware\Brave-Browser\NativeMessagingHosts"],
   "edge": [r"Software\Microsoft\Edge\NativeMessagingHosts"],
   "vivaldi": [r"Software\Vivaldi\NativeMessagingHosts"],
+  "firefox": [r"Software\Mozilla\NativeMessagingHosts"],
 }
 
 CONFIG_DIR = Path(os.environ.get("XDG_CONFIG_HOME", str(Path.home() / ".config"))) / APP_NAME