diff --git a/pkgs/firefox-addons/default.nix b/pkgs/firefox-addons/default.nix
index 7c5a5650..4e7264d5 100644
--- a/pkgs/firefox-addons/default.nix
+++ b/pkgs/firefox-addons/default.nix
@@ -1,5 +1,24 @@
 { buildFirefoxXpiAddon, fetchurl, lib, stdenv }:
   {
+    "extended-color-management" = buildFirefoxXpiAddon {
+      pname = "extended-color-management";
+      version = "1.1.1";
+      addonId = "{816dd215-0e91-4621-9d89-3bac78798e6f}";
+      url = "https://addons.mozilla.org/firefox/downloads/file/3966904/extended_color_management-1.1.1.xpi";
+      sha256 = "8b09d9fb312635c428571bd74beacf67e426089ebc812c7f39e9c3b4dad05a0b";
+      meta = with lib;
+      {
+        description = "Ever wish that Firefox didn't use color management when viewing images or video? Turn it off easily with this add-on.";
+        license = licenses.mpl20;
+        mozPermissions = [
+          "browserSettings"
+          "notifications"
+          "storage"
+          "<all_urls>"
+        ];
+        platforms = platforms.all;
+      };
+    };
     "get-rss-feed-url" = buildFirefoxXpiAddon {
       pname = "get-rss-feed-url";
       version = "2.2";
@@ -44,6 +63,29 @@
         platforms = platforms.all;
       };
     };
+    "microsoft-container" = buildFirefoxXpiAddon {
+      pname = "microsoft-container";
+      version = "1.0.4";
+      addonId = "@contain-microsoft";
+      url = "https://addons.mozilla.org/firefox/downloads/file/3711415/microsoft_container-1.0.4.xpi";
+      sha256 = "8780c9edcfa77a9f3eaa7da228a351400c42a884fec732cafc316e07f55018d3";
+      meta = with lib;
+      {
+        homepage = "https://github.com/kouassi-goli/contain-microsoft";
+        description = "This add-on is an unofficial fork of Mozilla's Facebook Container designed for Microsoft. \n Microsoft Container isolates your Microsoft activity from the rest of your web activity and prevent Microsoft from tracking you outside of the its website.";
+        license = licenses.mpl20;
+        mozPermissions = [
+          "<all_urls>"
+          "contextualIdentities"
+          "cookies"
+          "management"
+          "tabs"
+          "webRequestBlocking"
+          "webRequest"
+        ];
+        platforms = platforms.all;
+      };
+    };
     "regretsreporter" = buildFirefoxXpiAddon {
       pname = "regretsreporter";
       version = "2.1.2";
diff --git a/pkgs/firefox-addons/firefox-addons.json b/pkgs/firefox-addons/firefox-addons.json
index 022c446f..52d2db8b 100644
--- a/pkgs/firefox-addons/firefox-addons.json
+++ b/pkgs/firefox-addons/firefox-addons.json
@@ -2,31 +2,30 @@
   {
     "slug": "updateswh"
   },
-
   {
     "slug": "zhongwen"
   },
-
   {
     "slug": "get-rss-feed-url"
   },
-
   {
     "slug": "regretsreporter"
   },
-
+  {
+    "slug": "extended-color-management"
+  },
   {
     "slug": "simple-translate"
   },
-
   {
     "slug": "tineye-reverse-image-search"
   },
-
   {
     "slug": "google-container"
   },
-
+  {
+    "slug": "microsoft-container"
+  },
   {
     "slug": "sourcegraph-for-firefox"
   }