no-bug: Sync upstream Firefox to version 149.0 (gh-12904)

This PR syncs the upstream Firefox to version 149.0.

* ✅ All patches applied cleanly.

---------

Signed-off-by: mr. m <91018726+mr-cheffy@users.noreply.github.com>

surfer.json

@@ -5,7 +5,7 @@
   "binaryName": "zen",
   "version": {
     "product": "firefox",
-    "version": "148.0.2",
+    "version": "149.0",
     "candidate": "149.0",
     "candidateBuild": 1
   },
@@ -20,7 +20,7 @@
       "brandShortName": "Zen",
       "brandFullName": "Zen Browser",
       "release": {
-        "displayVersion": "1.19.3b",
+        "displayVersion": "1.19.4b",
         "github": {
           "repo": "zen-browser/desktop"
         },
@@ -54,4 +54,4 @@
     "licenseType": "MPL-2.0"
   },
   "updateHostname": "updates.zen-browser.app"
-}
+}