add firefox declaratively

configuration.nix

@@ -118,7 +118,7 @@ in
     # DVORAK + NO
     xkb.layout = "us,no";
     xkb.variant = "dvp,";
-    xkb.options = "compose:menu, grp:alt_shift_toggle, lv3:ralt_switch";
+    xkb.options = "compose:alt,grp:alt_shift_toggle,lv3:menu";
 
     exportConfiguration = true;
 

flake.lock

@@ -1,5 +1,27 @@
 {
   "nodes": {
+    "firefox-addons": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "dir": "pkgs/firefox-addons",
+        "lastModified": 1765080359,
+        "narHash": "sha256-BvAgmqgswcokD2eWoyO3uB1k1VTdpxDHGSx0RYRFjDg=",
+        "owner": "rycee",
+        "repo": "nur-expressions",
+        "rev": "35f8ab2ecd954b3a348aa0e253878211c48a0aa7",
+        "type": "gitlab"
+      },
+      "original": {
+        "dir": "pkgs/firefox-addons",
+        "owner": "rycee",
+        "repo": "nur-expressions",
+        "type": "gitlab"
+      }
+    },
     "flake-parts": {
       "inputs": {
         "nixpkgs-lib": [
@@ -151,6 +173,7 @@
     },
     "root": {
       "inputs": {
+        "firefox-addons": "firefox-addons",
         "home-manager": "home-manager",
         "nixpkgs": "nixpkgs",
         "nixvim": "nixvim",

flake.nix

@@ -36,6 +36,11 @@
     #   url = "git+file:///home/fredrikr/Programming/uiua/qotd";
     #   inputs.nixpkgs.follows = "nixpkgs";
     # };
+
+    firefox-addons = {
+      url = "gitlab:rycee/nur-expressions?dir=pkgs/firefox-addons";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
   outputs =

home.nix

@@ -135,6 +135,7 @@ in
 
   home.sessionVariables = {
     EDITOR = "nvim";
+    MOZ_USE_XINPUT2 = "1";
   };
 
   programs.home-manager.enable = true;
@@ -1207,4 +1208,72 @@ in
         "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36";
     };
   };
+
+  programs.firefox = {
+    enable = true;
+
+    profiles.default = {
+      id = 0;
+      name = "default";
+      isDefault = true;
+
+      settings = {
+        # Memory optimization
+        "dom.ipc.processCount" = 1;
+        "dom.ipc.processCount.webIsolated" = 1;
+        "fission.autostart" = false;
+        "browser.cache.memory.capacity" = 2097152;
+
+        # Hardware acceleration
+        "gfx.webrender.all" = true;
+        "media.hardware-video-decoding.force-enabled" = true;
+        "layers.acceleration.force-enabled" = true;
+
+        # UI customization
+        "toolkit.legacyUserProfileCustomizations.stylesheets" = true;
+        "browser.compactmode.show" = true;
+
+        # Clean interface
+        "browser.startup.homepage" = "about:blank";
+        "browser.newtabpage.enabled" = false;
+        "browser.newtabpage.activity-stream.feeds.section.highlights" = false;
+
+        # Privacy
+        "privacy.resistFingerprinting" = true;
+        "dom.security.https_only_mode" = true;
+      };
+
+      # Minimal userChrome.css
+      userChrome = ''
+        /* Hide tab bar when single tab */
+        #tabbrowser-tabs {
+          visibility: collapse !important;
+        }
+        #tabbrowser-tabs[overflow="true"],
+        #tabbrowser-tabs:not([overflow]) {
+          visibility: visible !important;
+        }
+
+        /* Auto-hide address bar */
+        #nav-bar {
+          margin-top: -40px !important;
+          transition: margin-top 0.2s ease !important;
+        }
+        #navigator-toolbox:hover #nav-bar,
+        #nav-bar:focus-within {
+          margin-top: 0px !important;
+        }
+
+        /* Clean minimal look */
+        #identity-box,
+        #tracking-protection-icon-container,
+        #urlbar-zoom-button,
+        #star-button-box { display: none !important; }
+      '';
+
+      extensions = with inputs.firefox-addons.packages.${pkgs.system}; [
+        ublock-origin
+      ];
+    };
+  };
 }