flake: Remove rycee's firefox addons repo

I can't be arsed to work around this until it's fixed:
https://github.com/NixOS/nixpkgs/issues/427155

flake.lock

@@ -47,29 +47,6 @@
         "type": "github"
       }
     },
-    "firefox-addons": {
-      "inputs": {
-        "nixpkgs": [
-          "nixpkgs-unstable"
-        ]
-      },
-      "locked": {
-        "dir": "pkgs/firefox-addons",
-        "lastModified": 1753157005,
-        "narHash": "sha256-fTdJ2yYjR8O3kEWsveBGu/d8ilEFxVnGkF4wS3N1Was=",
-        "owner": "rycee",
-        "repo": "nur-expressions",
-        "rev": "a38f383959d8bf0c1d5d555469a4c63c4632701f",
-        "type": "gitlab"
-      },
-      "original": {
-        "dir": "pkgs/firefox-addons",
-        "owner": "rycee",
-        "ref": "master",
-        "repo": "nur-expressions",
-        "type": "gitlab"
-      }
-    },
     "flake-parts": {
       "inputs": {
         "nixpkgs-lib": "nixpkgs-lib"
@@ -336,7 +313,6 @@
       "inputs": {
         "agenix": "agenix",
         "colmena": "colmena",
-        "firefox-addons": "firefox-addons",
         "flake-parts": "flake-parts",
         "home-manager": "home-manager",
         "home-manager-unstable": "home-manager-unstable",

flake.nix

@@ -55,11 +55,6 @@
       flake = false;
     };
 
-    firefox-addons = {
-      url = "gitlab:rycee/nur-expressions?ref=master&dir=pkgs/firefox-addons";
-      inputs.nixpkgs.follows = "nixpkgs-unstable";
-    };
-
     scoutshonour = {
       url = "git+https://git.qenya.tel/qenya/nix-scoutshonour?ref=main";
       inputs.nixpkgs.follows = "nixpkgs-unstable";

home/qenya/firefox.nix

@@ -9,13 +9,45 @@ in
     enable = true;
     languagePacks = [ "en-GB" ];
 
-    profiles.default = {
-      extensions.packages = with inputs.firefox-addons.packages.${pkgs.hostPlatform.system}; [
-        onepassword-password-manager
-        bitwarden
-        ublock-origin
-      ];
+    policies = {
+      ExtensionSettings = {
+        # uBlock Origin
+        "uBlock0@raymondhill.net" = {
+          install_url = "https://addons.mozilla.org/firefox/downloads/latest/ublock-origin/latest.xpi";
+          installation_mode = "force_installed";
+          private_browsing = true;
+        };
+        # Bitwarden
+        "{446900e4-71c2-419f-a6a7-df9c091e268b}" = {
+          install_url = "https://addons.mozilla.org/firefox/downloads/latest/bitwarden-password-manager/latest.xpi";
+          installation_mode = "force_installed";
+          default_area = "navbar";
+        };
+        # 1Password
+        "{d634138d-c276-4fc8-924b-40a0ea21d284}" = {
+          install_url = "https://addons.mozilla.org/firefox/downloads/latest/1password-x-password-manager/latest.xpi";
+          installation_mode = "force_installed";
+          default_area = "navbar";
+        };
+        # Disqus Auto-Expander
+        "disqus-auto-expander@john30013.com" = {
+          install_url = "https://addons.mozilla.org/firefox/downloads/latest/disqus-auto-expander/latest.xpi";
+          installation_mode = "force_installed";
+        };
+        # Indie Wiki Buddy
+        "{cb31ec5d-c49a-4e5a-b240-16c767444f62}" = {
+          install_url = "https://addons.mozilla.org/firefox/downloads/latest/indie-wiki-buddy/latest.xpi";
+          installation_mode = "force_installed";
+        };
+        # SteamDB
+        "firefox-extension@steamdb.info" = {
+          install_url = "https://addons.mozilla.org/firefox/downloads/latest/steam-database/latest.xpi";
+          installation_mode = "force_installed";
+        };
+      };
+    };
 
+    profiles.default = {
       settings = {
         "browser.startup.page" = 3; # resume previous session
         "browser.newtabpage.activity-stream.showSponsored" = false;

home/qenya/packages.nix

@@ -24,7 +24,8 @@ in
     _1password-gui
     bitwarden
     discord
-    gimp-with-plugins
+    # https://github.com/NixOS/nixpkgs/issues/427155
+    # gimp-with-plugins
     jellyfin-media-player
     tor-browser-bundle-bin
     zoom-us