diff --git a/nixcfgs/flake.lock b/nixcfgs/flake.lock
index 06d1f42..6d93210 100644
--- a/nixcfgs/flake.lock
+++ b/nixcfgs/flake.lock
@@ -137,6 +137,27 @@
         "type": "github"
       }
     },
+    "firefox-addons": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1763254583,
+        "narHash": "sha256-qOCvJgLGKahIG9DWcLUMjadAR/0KZeEypIqw3ASj2sA=",
+        "owner": "petrkozorezov",
+        "repo": "firefox-addons-nix",
+        "rev": "7a779c26bd1e6caf1fe45f905253c41e5b03c2b7",
+        "type": "github"
+      },
+      "original": {
+        "owner": "petrkozorezov",
+        "repo": "firefox-addons-nix",
+        "type": "github"
+      }
+    },
     "flake-compat": {
       "flake": false,
       "locked": {
@@ -213,6 +234,23 @@
         "type": "github"
       }
     },
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems_2"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "id": "flake-utils",
+        "type": "indirect"
+      }
+    },
     "gitignore": {
       "inputs": {
         "nixpkgs": [
@@ -350,7 +388,7 @@
         "hyprwayland-scanner": "hyprwayland-scanner",
         "nixpkgs": "nixpkgs_7",
         "pre-commit-hooks": "pre-commit-hooks",
-        "systems": "systems_2",
+        "systems": "systems_3",
         "xdph": "xdph"
       },
       "locked": {
@@ -944,6 +982,7 @@
       "inputs": {
         "betterfox-nix": "betterfox-nix",
         "caelestia-shell": "caelestia-shell",
+        "firefox-addons": "firefox-addons",
         "home-manager": "home-manager",
         "niri-flake": "niri-flake",
         "nix-darwin": "nix-darwin",
@@ -953,7 +992,8 @@
         "nur": "nur",
         "plasma-manager": "plasma-manager",
         "sops-nix": "sops-nix",
-        "xremap-flake": "xremap-flake"
+        "xremap-flake": "xremap-flake",
+        "zen-browser": "zen-browser"
       }
     },
     "sops-nix": {
@@ -992,6 +1032,21 @@
       }
     },
     "systems_2": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "systems_3": {
       "locked": {
         "lastModified": 1689347949,
         "narHash": "sha256-12tWmuL2zgBgZkdoB6qXZsgJEH9LR3oUgpaQq2RbI80=",
@@ -1145,6 +1200,26 @@
         "repo": "xwayland-satellite",
         "type": "github"
       }
+    },
+    "zen-browser": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1762827415,
+        "narHash": "sha256-YxPQbafcd09foVFn5yHggTZDbXsrtHVae+iwo2wGn0w=",
+        "owner": "youwen5",
+        "repo": "zen-browser-flake",
+        "rev": "6e0ad935d9caad128d2c58b2a1ba31524c0fe7f1",
+        "type": "github"
+      },
+      "original": {
+        "owner": "youwen5",
+        "repo": "zen-browser-flake",
+        "type": "github"
+      }
     }
   },
   "root": "root",
diff --git a/nixcfgs/flake.nix b/nixcfgs/flake.nix
index 39aaa6f..f892523 100644
--- a/nixcfgs/flake.nix
+++ b/nixcfgs/flake.nix
@@ -37,6 +37,14 @@
     xremap-flake.url = "github:xremap/nix-flake";
     # betterfox - preconfigured firefox user.js
     betterfox-nix.url = "github:HeitorAugustoLN/betterfox-nix";
+    firefox-addons = {
+      url = "github:petrkozorezov/firefox-addons-nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    zen-browser = {
+      url = "github:youwen5/zen-browser-flake";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
   outputs = {
@@ -53,13 +61,19 @@
     niri-flake,
     xremap-flake,
     betterfox-nix,
+    firefox-addons,
+    zen-browser,
     ...
   } @ inputs: let
     overlays = [
       nur.overlays.default
+      firefox-addons.overlays.default
       (final: prev: {
         caelestia-shell = caelestia-shell.packages.x86_64-linux.caelestia-shell;
       })
+      (final: pref: {
+        zen-browser = zen-browser.packages.x86_64-linux.zen-browser;
+      })
     ];
     forSystem = system:
       import nixpkgs {
diff --git a/nixcfgs/modules/nixos/desktop/xremap.nix b/nixcfgs/modules/nixos/desktop/xremap.nix
index 42f47ff..f06f457 100644
--- a/nixcfgs/modules/nixos/desktop/xremap.nix
+++ b/nixcfgs/modules/nixos/desktop/xremap.nix
@@ -42,7 +42,13 @@
         {
           name = "IM Navigator - Alt-Up/Down";
           application = {
-            only = ["org.telegram.desktop" "telegram-desktop" "wechat"];
+            only = [
+              "org.telegram.desktop"
+              "telegram-desktop"
+              "io.github.kukuruzka165.materialgram"
+              "materialgram"
+              "wechat"
+            ];
           };
           remap = {
             "M-j" = "M-down";
diff --git a/nixcfgs/modules/nixos/programs/firefox.nix b/nixcfgs/modules/nixos/programs/firefox.nix
index 3039fda..ba2c54d 100644
--- a/nixcfgs/modules/nixos/programs/firefox.nix
+++ b/nixcfgs/modules/nixos/programs/firefox.nix
@@ -5,8 +5,8 @@
     languagePacks = ["zh-CN"];
 
     preferences = {
-      "widget.use-xdg-desktop-portal.file-picker" = 1;
-      "widget.use-xdg-desktop-portal.mime-handler" = 1;
+      # "widget.use-xdg-desktop-portal.file-picker" = 1;
+      # "widget.use-xdg-desktop-portal.mime-handler" = 1;
       "screenshots.browser.component.enabled" = false;
       "toolkit.telemetry.enabled" = false;
       "toolkit.telemetry.archive.enabled" = false;
diff --git a/nixcfgs/users/js0ny/packages/gui.nix b/nixcfgs/users/js0ny/packages/gui.nix
index f86c94a..29dbbfd 100644
--- a/nixcfgs/users/js0ny/packages/gui.nix
+++ b/nixcfgs/users/js0ny/packages/gui.nix
@@ -27,7 +27,7 @@
     rose-pine-cursor
 
     pcloud
-    telegram-desktop
+    materialgram
     steam
     signal-desktop
     # Use Wayland for Jetbrains
diff --git a/nixcfgs/users/js0ny/programs/chromium.nix b/nixcfgs/users/js0ny/programs/chromium.nix
index b406b83..16797bc 100644
--- a/nixcfgs/users/js0ny/programs/chromium.nix
+++ b/nixcfgs/users/js0ny/programs/chromium.nix
@@ -1,11 +1,14 @@
-{pkgs, ...}: {
+{...}: {
   programs.chromium = {
     enable = true;
     commandLineArgs = [
-      "--enable-wayland-ime"
-      "--enable-features=WaylandWindowDecorations"
-      "--enable-features=UseOzonePlatform"
-      "--ozone-platform-hint=auto"
+      # Done by NIXOS_OZONE_WL=1
+      # "--enable-wayland-ime"
+      # "--enable-features=WaylandWindowDecorations"
+      # "--enable-features=UseOzonePlatform"
+      # "--ozone-platform-hint=auto"
+      # See: https://wiki.archlinux.org/title/Chromium#Touchpad_gestures_for_navigation
+      "--enable-features=TouchpadOverscrollHistoryNavigation"
     ];
     extensions = [
       {id = "cjpalhdlnbpafiamejdnhcphjbkeiagm";} # ublock origin
diff --git a/nixcfgs/users/js0ny/programs/firefox/addons.nix b/nixcfgs/users/js0ny/programs/firefox/addons.nix
index a1bdddd..d8dada8 100644
--- a/nixcfgs/users/js0ny/programs/firefox/addons.nix
+++ b/nixcfgs/users/js0ny/programs/firefox/addons.nix
@@ -1,31 +1,75 @@
 {pkgs, ...}: let
-  addons = pkgs.nur.repos.rycee.firefox-addons;
+  addons = pkgs.firefox-addons;
 in {
   # imports = [./lib.nix]; # TODO: Declarative extension permissions
   programs.firefox.profiles.default = {
     extensions.packages = with addons; [
-      ublock-origin
+      # Keybindings & Gestures & User Scripts
+      foxy-gestures
+      shortkeys
+      surfingkeys_ff
+      violentmonkey
+
+      # Theming
+      material-icons-for-github
+
+      # Browsing Enhancement
       darkreader
+      bionic-reader
+      ublock-origin
+      refined-github-
+      global-speed
+      buster-captcha-solver
+      sidebery
+
+      # Cookies
+      cookie-quick-manager
+      cookie-autodelete
+      consent-o-matic # istilldontcareaboutcookies alt
+
+      # Privacy
+      google-container
+      facebook-container
+
+      ### Site Specific
+      # Steam
+      steam-database
+      protondb-for-steam
+      # YouTube
+      return-youtube-dislikes
+      sponsorblock
+      # Bilibili
+      bilisponsorblock
+
+      # Misc
       rsshub-radar
       proton-pass
       proton-vpn
-      surfingkeys
-      web-archives
-      tampermonkey
-      stylus
-      foxy-gestures
-      google-container
-      refined-github
-      downthemall
-      material-icons-for-github
-      single-file
-      return-youtube-dislikes
-      steam-database
-      bilisponsorblock
-      sponsorblock
-      buster-captcha-solver
-      protondb-for-steam
-      i-dont-care-about-cookies
+      styl-us
+      kiss-translator
+
+      # Disabled
+      # view-page-archive # Web Archives
+      # single-file
+      # downthemall
+
+      # Install globally by policies: see modules/nixos/programs/firefox.nix
+      # clearurls
+      # multi-account-container
     ];
   };
+  programs.firefox = {
+    policies = {
+      ExtensionSettings = [
+        {
+          name = "zotero@chnm.gmu.edu";
+          value = {
+            install_url = "https://download.zotero.org/connector/firefox/release/Zotero_Connector-5.0.189.xpi";
+            installation_mode = "allow";
+            private_browsing = false;
+          };
+        }
+      ];
+    };
+  };
 }
diff --git a/nixcfgs/users/js0ny/programs/firefox/default.nix b/nixcfgs/users/js0ny/programs/firefox/default.nix
index 66872f7..9d31fea 100644
--- a/nixcfgs/users/js0ny/programs/firefox/default.nix
+++ b/nixcfgs/users/js0ny/programs/firefox/default.nix
@@ -10,10 +10,16 @@
     enable = true;
     profiles.default = {
       settings = {
+        "browser.toolbars.bookmarks.visibility" = "never";
         "extensions.update.enabled" = true;
         "sidebar.expandOnHover" = true;
         "sidebar.visibility" = "expand-on-hover";
         "toolkit.legacyUserProfileCustomizations.stylesheets" = true;
+        "toolkit.tabbox.switchByScrolling" = true;
+        "browser.uidensity" = 1;
+        # Disable Menu when pressing <Alt>
+        "ui.key.menuAccessKey" = -1;
+        "ui.key.menuAccessKeyFocuses" = false;
       };
     };
   };
diff --git a/nixcfgs/users/js0ny/programs/floorp.nix b/nixcfgs/users/js0ny/programs/floorp.nix
index 1d884aa..ca5efaf 100644
--- a/nixcfgs/users/js0ny/programs/floorp.nix
+++ b/nixcfgs/users/js0ny/programs/floorp.nix
@@ -1,19 +1,30 @@
-{pkgs, ...}: {
+{
+  pkgs,
+  lib,
+  ...
+}: let
+  a = pkgs.firefox-addons;
+in {
+  home.file.".floorp/profiles.ini".force = lib.mkForce true;
+  home.file.".floorp/js0ny/search.json.mozlz4".force = lib.mkForce true;
   programs.floorp = {
     enable = true;
-    package = pkgs.floorp;
     policies = {
       DisableTelemetry = true;
       BlockAboutConfig = false;
       DisableFirefoxScreenshots = true;
       DontCheckDefaultBrowser = true;
 
+      Preferences = {
+      };
+
       ExtensionSettings = with builtins; let
         extension = short: uuid: {
           name = uuid;
           value = {
             install_url = "https://addons.mozilla.org/firefox/downloads/latest/${short}/latest.xpi";
-            installation_mode = "force_installed";
+            updates_disabled = true;
+            private_browsing = true;
           };
         };
       in
@@ -54,7 +65,7 @@
         ];
       };
     };
-    profiles.default = {
+    profiles.js0ny = {
       search.engines = {
         archwiki = {
           name = "ArchWiki";
@@ -113,27 +124,36 @@
           definedAliases = ["@gh"];
         };
       };
-      extensions.packages = with pkgs.nur.repos.rycee.firefox-addons; [
-        darkreader
-        rsshub-radar
-        proton-pass
-        surfingkeys
-        web-archives
-        #       immersive-translate
-        tampermonkey
-        stylus
-        foxy-gestures
-        google-container
-        refined-github
-        downthemall
-        material-icons-for-github
-        single-file
-        return-youtube-dislikes
-        steam-database
-        bilisponsorblock
-        sponsorblock
-        buster-captcha-solver
-      ];
+      extensions = {
+        packages = with pkgs.firefox-addons; [
+          ublock-origin
+          darkreader
+          rsshub-radar
+          proton-pass
+          proton-vpn
+          surfingkeys_ff
+          view-page-archive # Web Archives
+          tampermonkey
+          styl-us
+          foxy-gestures
+          google-container
+          refined-github-
+          downthemall
+          material-icons-for-github
+          single-file
+          return-youtube-dislikes
+          steam-database
+          bilisponsorblock
+          sponsorblock
+          buster-captcha-solver
+          protondb-for-steam
+          i-dont-care-about-cookies
+          global-speed
+          kiss-translator
+          # sidebery
+        ];
+        force = true;
+      };
     };
   };
 }
diff --git a/nixcfgs/users/js0ny/programs/mime.nix b/nixcfgs/users/js0ny/programs/mime.nix
index 7b7f62d..a387629 100644
--- a/nixcfgs/users/js0ny/programs/mime.nix
+++ b/nixcfgs/users/js0ny/programs/mime.nix
@@ -1,4 +1,7 @@
 {...}: let
+  # Why using nvim gui:
+  #   * when `rga-fzf`: nvim wrapper failed to launch
+  #   * nvim wrapper reports error on parsing filename with spaces
   gvim = "nvim-qt.desktop";
 in {
   xdg.configFile."mimeapps.list".force = true;
@@ -14,6 +17,7 @@ in {
       # Source Code - C
       "text/x-csrc" = gvim; # .c
       "text/x-chdr" = gvim; # .h
+      "text/javascript" = gvim;
       # CSV
       "text/csv" = gvim;
       # File Explorer