diff --git a/package.json b/package.json
index e2b0476bf..14e2a441e 100644
--- a/package.json
+++ b/package.json
@@ -85,7 +85,7 @@
     "standard": "12.0.1",
     "terser": "3.8.2",
     "transform-loader": "0.2.4",
-    "web-ext": "2.9.0",
+    "web-ext": "2.9.1",
     "webpack": "4.17.1",
     "webpack-bundle-analyzer": "2.13.1",
     "webpack-cli": "3.1.0",
@@ -105,12 +105,12 @@
     "is-ipfs": "0.4.2",
     "is-svg": "3.0.0",
     "lru-cache": "4.1.3",
-    "mime-types": "2.1.19",
+    "mime-types": "2.1.20",
     "p-queue": "3.0.0",
     "path-browserify": "1.0.0",
     "piggybacker": "2.0.0",
     "pull-file-reader": "1.0.2",
     "tachyons": "4.11.1",
-    "webextension-polyfill": "0.1.2"
+    "webextension-polyfill": "0.3.1"
   }
 }
diff --git a/yarn.lock b/yarn.lock
index f7b6aac6b..827ec10f8 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7374,11 +7374,11 @@ mime-db@~1.36.0:
   version "1.36.0"
   resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.36.0.tgz#5020478db3c7fe93aad7bbcc4dcf869c43363397"
 
-mime-types@2.1.19, mime-types@^2.1.19:
-  version "2.1.19"
-  resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.19.tgz#71e464537a7ef81c15f2db9d97e913fc0ff606f0"
+mime-types@2.1.20, mime-types@~2.1.19:
+  version "2.1.20"
+  resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.20.tgz#930cb719d571e903738520f8470911548ca2cc19"
   dependencies:
-    mime-db "~1.35.0"
+    mime-db "~1.36.0"
 
 mime-types@^2.1.12, mime-types@^2.1.18, mime-types@~2.1.17, mime-types@~2.1.18:
   version "2.1.18"
@@ -7386,11 +7386,11 @@ mime-types@^2.1.12, mime-types@^2.1.18, mime-types@~2.1.17, mime-types@~2.1.18:
   dependencies:
     mime-db "~1.33.0"
 
-mime-types@~2.1.19:
-  version "2.1.20"
-  resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.20.tgz#930cb719d571e903738520f8470911548ca2cc19"
+mime-types@^2.1.19:
+  version "2.1.19"
+  resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.19.tgz#71e464537a7ef81c15f2db9d97e913fc0ff606f0"
   dependencies:
-    mime-db "~1.36.0"
+    mime-db "~1.35.0"
 
 mime@1.4.1:
   version "1.4.1"
@@ -11642,9 +11642,9 @@ wcwidth@^1.0.0:
   dependencies:
     defaults "^1.0.3"
 
-web-ext@2.9.0:
-  version "2.9.0"
-  resolved "https://registry.yarnpkg.com/web-ext/-/web-ext-2.9.0.tgz#360c9e8fe1009af2e8a68b043e938b03a9e21144"
+web-ext@2.9.1:
+  version "2.9.1"
+  resolved "https://registry.yarnpkg.com/web-ext/-/web-ext-2.9.1.tgz#41aef65dbaea97760607a5009bf0ffa634d9cdb9"
   dependencies:
     "@cliqz-oss/firefox-client" "0.3.1"
     "@cliqz-oss/node-firefox-connect" "1.2.1"
@@ -11684,9 +11684,9 @@ web-ext@2.9.0:
   version "0.1.1"
   resolved "https://codeload.github.com/dignifiedquire/webcrypto-shim/tar.gz/190bc9ec341375df6025b17ae12ddb2428ea49c8"
 
-webextension-polyfill@0.1.2:
-  version "0.1.2"
-  resolved "https://registry.yarnpkg.com/webextension-polyfill/-/webextension-polyfill-0.1.2.tgz#a625e3d4da33076ca147293566e42ef153dc3002"
+webextension-polyfill@0.3.1:
+  version "0.3.1"
+  resolved "https://registry.yarnpkg.com/webextension-polyfill/-/webextension-polyfill-0.3.1.tgz#fab2aed917a713a5d8221e41febad81c5d0b080f"
 
 webidl-conversions@^4.0.2:
   version "4.0.2"