diff --git a/package-lock.json b/package-lock.json
index 24cd2269..cf988b35 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,7 +12,7 @@
         "@eslint/js": "^9.39.1",
         "@types/chrome": "^0.1.29",
         "@types/eslint__js": "^9.14.0",
-        "@types/firefox-webext-browser": "^120.0.4",
+        "@types/firefox-webext-browser": "^143.0.0",
         "@types/fs-extra": "^11.0.4",
         "addons-linter": "^7.20.0",
         "commit-and-tag-version": "^12.6.0",
@@ -1084,9 +1084,9 @@
       "license": "MIT"
     },
     "node_modules/@types/firefox-webext-browser": {
-      "version": "120.0.4",
-      "resolved": "https://registry.npmjs.org/@types/firefox-webext-browser/-/firefox-webext-browser-120.0.4.tgz",
-      "integrity": "sha512-lBrpf08xhiZBigrtdQfUaqX1UauwZ+skbFiL8u2Tdra/rklkKadYmIzTwkNZSWtuZ7OKpFqbE2HHfDoFqvZf6w==",
+      "version": "143.0.0",
+      "resolved": "https://registry.npmjs.org/@types/firefox-webext-browser/-/firefox-webext-browser-143.0.0.tgz",
+      "integrity": "sha512-865dYKMOP0CllFyHmgXV4IQgVL51OSQQCwSoihQ17EwugePKFSAZRc0EI+y7Ly4q7j5KyURlA7LgRpFieO4JOw==",
       "dev": true,
       "license": "MIT"
     },
diff --git a/package.json b/package.json
index 6cd371c4..54fe0a58 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,7 @@
     "@eslint/js": "^9.39.1",
     "@types/chrome": "^0.1.29",
     "@types/eslint__js": "^9.14.0",
-    "@types/firefox-webext-browser": "^120.0.4",
+    "@types/firefox-webext-browser": "^143.0.0",
     "@types/fs-extra": "^11.0.4",
     "addons-linter": "^7.20.0",
     "commit-and-tag-version": "^12.6.0",