diff --git a/.config/nvim/plugin/luasnip.lua b/.config/nvim/plugin/luasnip.lua
index bd6ab457..65fe4532 100644
--- a/.config/nvim/plugin/luasnip.lua
+++ b/.config/nvim/plugin/luasnip.lua
@@ -5,8 +5,8 @@ local cr = function() return t { "", "" } end
 local i = luasnip.insert_node
 local f = luasnip.function_node
 
-local function datetime() return os.date('%Y-%m-%d %H:%M:%S') end
-local function date() return os.date('%Y-%m-%d') end
+local function datetime() return os.date("%Y-%m-%d %H:%M:%S") end
+local function date() return os.date("%Y-%m-%d") end
 local function quoted(s) return '"' .. s .. '"' end
 
 luasnip.add_snippets("typst", {
@@ -57,5 +57,9 @@ luasnip.add_snippets("ruler", {
     }),
 })
 
+luasnip.add_snippets("nix", {
+    s("system", { t("stdenv.hostPlatform.system") }),
+})
+
 local haskell_snippets = require("haskell-snippets").all
 luasnip.add_snippets("haskell", haskell_snippets, { key = "haskell" })
diff --git a/nix/configurations/vanadium.nix b/nix/configurations/vanadium.nix
index 80919604..7234fbdf 100644
--- a/nix/configurations/vanadium.nix
+++ b/nix/configurations/vanadium.nix
@@ -56,6 +56,7 @@ in
           ../overlays/eepy.nix
           ../overlays/calibre-no-mime.nix
           ../overlays/fcitx5-table-extra-taiwanese.nix
+          ../overlays/zen-browser.nix
 
           ../overlays/iosevka.nix
           ../packages/overlay.nix
@@ -152,6 +153,7 @@ in
         ./vanadium/home/programs.nix
         ./vanadium/home/misc.nix
 
+        ./vanadium/home/zen-browser.nix
         ./vanadium/home/firefox.nix
         ./vanadium/home/xmobar.nix
 
@@ -170,6 +172,7 @@ in
         ../homeModules/common/atuin.nix
         ../homeModules/common/direnv.nix
         ../homeModules/common/feh.nix
+        ../homeModules/common/zen-browser.nix
         ../homeModules/common/firefox.nix
         ../homeModules/common/fzf.nix
         ../homeModules/common/git.nix
@@ -191,6 +194,8 @@ in
         #
         (sources.agenix + "/modules/age-home.nix")
         sources.wired-notify.asFlake.homeManagerModules.default
+
+        sources.zen-browser.asFlake.homeModules.twilight
       ];
     }
 
diff --git a/nix/configurations/vanadium/home/firefox.nix b/nix/configurations/vanadium/home/firefox.nix
index aab6da3f..6edc85cb 100644
--- a/nix/configurations/vanadium/home/firefox.nix
+++ b/nix/configurations/vanadium/home/firefox.nix
@@ -8,7 +8,7 @@ let
 in
 {
   programs.firefox = {
-    enable = true;
+    enable = false;
 
     policies.SearchEngines.Add = [
       # Forges
diff --git a/nix/configurations/vanadium/home/xmonad/xmonad.hs b/nix/configurations/vanadium/home/xmonad/xmonad.hs
index a41e765d..76182ee5 100644
--- a/nix/configurations/vanadium/home/xmonad/xmonad.hs
+++ b/nix/configurations/vanadium/home/xmonad/xmonad.hs
@@ -95,7 +95,7 @@ isEvolutionComposer =
       ]
 
 isFirefox :: Query Bool
-isFirefox = className =? "firefox"
+isFirefox = className =? "firefox" <||> className ^? "zen"
 
 isSpotify :: Query Bool
 isSpotify = isFirefox <&&> title ~? "Spotify"
@@ -112,9 +112,11 @@ isSignal = className =? "Signal"
 isElement :: Query Bool
 isElement = isFirefox <&&> title ~? "Element"
 
--- This changes depending on the locale of the browser :/
 isFirefoxPip :: Query Bool
-isFirefoxPip = isFirefox <&&> title =? "Incrustation vidéo"
+isFirefoxPip =
+  isFirefox
+    -- This changes depending on the locale of the browser :/
+    <&&> (title =? "Incrustation vidéo" <||> title =? "Picture-in-Picture")
 
 isPavucontrol :: Query Bool
 isPavucontrol = className =? "pavucontrol"
@@ -223,7 +225,9 @@ myStartupHook = do
     -- - setting `home.sessionVariable` (home-manager) would only effect shells, probably due to the order of launched processes blah blah
     -- - setting `environment.sessionVariables` (NixOS) would make my set up less portable
     putEnv "GLFW_IM_MODULE=ibus"  -- Make sure kitty knows how to talk to fcitx
-    putEnv "MOZ_USE_XINPUT2=1"    -- Force touchpad for firefox
+
+    -- TODO: doesn't work for firefox nor for zen since 145.0
+    -- putEnv "MOZ_USE_XINPUT2=1"    -- Force touchpad for firefox
 
 removedKeybinds :: [(KeyMask, KeySym)]
 removedKeybinds =
@@ -309,7 +313,7 @@ keybinds =
      )
 
   -- Launcher
-  ++ (let launchFirefox = "if type firefox; then firefox; else firefox-esr; fi"
+  ++ (let launchFirefox = "zen"
           launchDmenu = "dmenu_run -i -fn \"Iosevka-14\" -nb \"#36363a\" -nf \"#e2e2e4\" -sb \"#f7f7f8\" -sf \"#36363a\" -l 10"
           lock = "xscreensaver-command -lock"
       in  [ ((controlMask .|. altMask, xK_m), namedScratchpadAction myScratchpads "cmus"  )
diff --git a/nix/configurations/vanadium/home/zen-browser.nix b/nix/configurations/vanadium/home/zen-browser.nix
new file mode 100644
index 00000000..beee8d6a
--- /dev/null
+++ b/nix/configurations/vanadium/home/zen-browser.nix
@@ -0,0 +1,165 @@
+{
+  pkgs,
+  config,
+  ...
+}:
+let
+  inherit (pkgs) nur;
+in
+{
+  programs.zen-browser = {
+    enable = true;
+
+    policies.SearchEngines.Add = [
+      # Forges
+      {
+        Name = "GitHub";
+        Alias = "@gh";
+        IconURL = "https://github.com/favicon.ico";
+        Description = "Your code yum yum";
+        URLTemplate = "https://github.com/search?q={searchTerms}&type=repositories";
+      }
+      {
+        Name = "GitHub (Code Search)";
+        Alias = "@ghc";
+        IconURL = "https://github.com/favicon.ico";
+        Description = "Your code yum yum";
+        URLTemplate = "https://github.com/search?q={searchTerms}&type=code";
+      }
+      {
+        Name = "Codeberg";
+        Alias = "@cb";
+        IconURL = "https://codeberg.org/favicon.ico";
+        Description = "Software development, but free!";
+        URLTemplate = "https://codeberg.org/explore/repos?q={searchTerms}";
+      }
+      {
+        Name = "?C";
+        Alias = "@cc";
+        IconURL = "https://git.confusedcompiler.org/favicon.ico";
+        URLTemplate = "https://git.confusedcompiler.org/explore/repos?q={searchTerms}";
+      }
+
+      # Nix{,OS,pkgs}
+      {
+        Name = "NixOS Search (Package)";
+        Alias = "@np";
+        IconURL = "https://nixos.org/favicon.ico";
+        Description = "Search in nixpkgs";
+        URLTemplate = "https://search.nixos.org/packages?query={searchTerms}";
+      }
+      {
+        Name = "NixOS Search (Options)";
+        Alias = "@no";
+        IconURL = "https://nixos.org/favicon.ico";
+        Description = "Search in NixOS options";
+        URLTemplate = "https://search.nixos.org/options?query={searchTerms}";
+      }
+
+      # Haskell
+      {
+        Name = "Flora";
+        Alias = "@hs";
+        IconURL = "https://flora.pm/static/icons/favicon-32x32.png";
+        URLTemplate = "https://flora.pm/search?q={searchTerms}";
+      }
+
+      # Discourse
+      {
+        Name = "NixOS Discourse";
+        Alias = "@nd";
+        IconURL = "https://nixos.org/favicon.ico";
+        URLTemplate = "https://discourse.nixos.org/search?q={searchTerms}";
+      }
+      {
+        Name = "Framework Discourse";
+        Alias = "@fd";
+        IconURL = "https://frame.work/favicon.ico";
+        URLTemplate = "https://community.frame.work/search?q={searchTerms}";
+      }
+
+      # Misc
+      {
+        Name = "YouTube";
+        Alias = "@yt";
+        IconURL = "https://youtube.com/favicon.ico";
+        SuggestURLTemplate = "http://suggestqueries.google.com/complete/search?q={searchTerms}&ds=yt";
+        URLTemplate = "https://www.youtube.com/results?search_query={searchTerms}";
+      }
+      {
+        Name = "Genius";
+        Alias = "@geni";
+        IconURL = "https://genius.com/favicon.ico";
+        URLTemplate = "https://genius.com/search?q={searchTerms}";
+      }
+    ];
+
+    profiles = {
+      default = {
+        settings = {
+          # "full-screen-api.ignore-widgets" = true; # limit fullscreen mode to window
+        };
+        userChrome = ''
+          /* monofont tweak */
+          #statuspanel-label {
+            font-family: monospace;
+          }
+          .urlbar-input-box {
+            font-family: monospace;
+          }
+        '';
+        extensions.packages =
+          let
+            addons = nur.repos.rycee.firefox-addons;
+          in
+          [
+            addons.sponsorblock
+            addons.return-youtube-dislikes
+            addons.consent-o-matic
+          ];
+      };
+
+      junk = {
+        id = 1;
+        inherit (config.programs.zen-browser.profiles.default)
+          settings
+          userChrome
+          ;
+
+        extensions.packages =
+          let
+            addons = nur.repos.rycee.firefox-addons;
+          in
+          [ addons.multi-account-containers ];
+
+        containers = {
+          raisin = {
+            color = "purple";
+            icon = "fruit";
+            id = 1;
+          };
+          pomme = {
+            color = "red";
+            icon = "fruit";
+            id = 2;
+          };
+        };
+      };
+
+      # Isolate it because it's proprietary
+      tampermonkey = {
+        id = 2;
+        inherit (config.programs.zen-browser.profiles.default)
+          settings
+          userChrome
+          ;
+
+        extensions.packages =
+          let
+            addons = nur.repos.rycee.firefox-addons;
+          in
+          [ addons.tampermonkey ];
+      };
+    };
+  };
+}
diff --git a/nix/homeModules/common/firefox.nix b/nix/homeModules/common/firefox.nix
index d479571b..853888c9 100644
--- a/nix/homeModules/common/firefox.nix
+++ b/nix/homeModules/common/firefox.nix
@@ -140,7 +140,7 @@ in
         "x-scheme-handler/unknown" = "firefox.desktop";
       };
     in
-    lib.mkIf cfg.enable {
+    lib.mkIf (cfg.enable && !config.programs.zen-browser.enable) {
       enable = true;
       associations.added = associations;
       defaultApplications = associations;
diff --git a/nix/homeModules/common/zen-browser.nix b/nix/homeModules/common/zen-browser.nix
new file mode 100644
index 00000000..4b8227ea
--- /dev/null
+++ b/nix/homeModules/common/zen-browser.nix
@@ -0,0 +1,167 @@
+{
+  pkgs,
+  config,
+  lib,
+  ...
+}:
+let
+  inherit (pkgs) nur;
+
+  cfg = config.programs.zen-browser;
+in
+{
+  programs.zen-browser = {
+    # https://mozilla.github.io/policy-templates
+    # The following have more complex logic, keep them as policies and not profiles
+    policies = {
+      RequestedLocales = [
+        "fr-FR" # for fuck sake stop showing me translated version of French gov sites
+        "zh-TW"
+        "en-US"
+      ];
+
+      SearchEngines = {
+        Remove = [
+          "Google"
+          "Bing"
+          "DuckDuckGo"
+          "Qwant"
+          "eBay"
+          "Perplexity"
+        ];
+        Default = "Brave";
+        Add = [
+          {
+            Name = "Brave";
+            Alias = "@br";
+            URLTemplate = "https://search.brave.com/search?q={searchTerms}&source=web";
+            SuggestURLTemplate = "https://suggestqueries.google.com/complete/search?q={searchTerms}";
+          }
+        ];
+      };
+      NoDefaultBookmarks = true;
+      DisplayMenuBar = "never";
+      DisplayBookmarksToolbar = "never";
+      DNSOverHTTPS = {
+        Enabled = false;
+      };
+    };
+
+    # https://searchfox.org/mozilla-central/source/browser/components/enterprisepolicies/Policies.sys.mjs
+    # Some policies can be rewritten to profiles configuration
+    #
+    # TODO: try out the "locked" semantic from zen
+    # https://github.com/0xc000022070/zen-browser-flake/tree/main#preferences
+    #
+    # To check which option is mapped to which about:config
+    # - back preference file
+    #   cp .zen/default/prefs.js{,.bk}
+    # - click the buttons
+    # - diff it
+    #   diff .zen/default/prefs.js{.bk,}
+    profiles.default = {
+      settings = {
+        "toolkit.legacyUserProfileCustomizations.stylesheets" = true;
+        "browser.tabs.loadInBackground" = true;
+        "browser.ctrlTab.sortByRecentlyUsed" = false;
+        "layout.css.devPixelsPerPx" = 1.1;
+        "browser.startup.page" = 1;
+
+        # open links in new window
+        # this works a lot better with xmonad where I have a bunch of windows
+        "browser.link.open_newwindow" = 2;
+
+        # Sponsored crap
+        # Yes
+        "browser.newtabpage.activity-stream.showSearch" = true;
+        "browser.newtabpage.activity-stream.feeds.topsites" = true;
+        # No
+        "browser.newtabpage.activity-stream.showSponsoredTopSites" = false;
+        "browser.newtabpage.activity-stream.feeds.section.highlights" = false;
+        "browser.newtabpage.activity-stream.feeds.system.topstories" = false;
+        "browser.newtabpage.activity-stream.feeds.section.topstories" = false;
+        "browser.newtabpage.activity-stream.showSponsored" = false;
+
+        # URL
+        # Yes
+        "browser.urlbar.suggest.quicksuggest.nonsponsored" = true;
+        # No
+        "browser.urlbar.suggest.quicksuggest.sponsored" = false;
+
+        # Pasword manager
+        "signon.rememberSignons" = false;
+        "services.passwordSavingEnabled" = false;
+        "pref.privacy.disable_button.view_passwords" = false;
+
+        # Hardware acceleration
+        "layers.acceleration.disabled" = false;
+
+        # Screenshot
+        "screenshots.browser.component.enabled" = true;
+
+        # Recommendations
+        "browser.newtabpage.activity-stream.asrouter.userprefs.cfr.addons" = false;
+        "browser.newtabpage.activity-stream.asrouter.userprefs.cfr.features" = false;
+        "extensions.htmlaboutaddons.recommendations.enabled" = false; # Addons
+
+        # Onboarding
+        "browser.aboutwelcome.enabled" = false;
+
+        # AI crap
+        "browser.ml.chat.enabled" = false;
+        "browser.ml.chat.page" = false;
+        "browser.ml.chat.shortcuts" = false;
+        "browser.ml.chat.sidebar" = false;
+
+        # Prevent WebRTC leak
+        # https://mullvad.net/en/help/webrtc
+        "media.peerconnection.enabled" = false;
+      };
+
+      extensions.packages =
+        let
+          addons = nur.repos.rycee.firefox-addons;
+        in
+        [
+          addons.ublock-origin
+          addons.privacy-badger
+          addons.user-agent-string-switcher
+
+          /*
+            Here's to you who want to remove news feed eradicator because you find it annoying:
+            It is here to annoy you so it is less likely for you to be on the agency inversion path.
+            DO NOT REMOVE IT. I repeat, DO NOT REMOVE IT.
+
+            If you think it's annoying, go do some jump rope, sing, live.
+          */
+          addons.news-feed-eradicator # did you read the comment above?
+          addons.multi-account-containers
+        ];
+    };
+  };
+
+  xdg.mimeApps =
+    let
+      associations = lib.genAttrs [
+        "application/x-extension-shtml"
+        "application/x-extension-xhtml"
+        "application/x-extension-html"
+        "application/x-extension-xht"
+        "application/x-extension-htm"
+        # "x-scheme-handler/unknown"
+        # "x-scheme-handler/mailto"
+        "x-scheme-handler/chrome"
+        "x-scheme-handler/about"
+        "x-scheme-handler/https"
+        "x-scheme-handler/http"
+        "application/xhtml+xml"
+        # "application/json"
+        # "text/plain"
+        "text/html"
+      ] (_: cfg.package.meta.desktopFileName);
+    in
+    lib.mkIf cfg.enable {
+      associations.added = associations;
+      defaultApplications = associations;
+    };
+}
diff --git a/nix/overlays/zen-browser.nix b/nix/overlays/zen-browser.nix
new file mode 100644
index 00000000..f4ffa489
--- /dev/null
+++ b/nix/overlays/zen-browser.nix
@@ -0,0 +1,19 @@
+let
+  sources = import ../../npins;
+in
+final: _:
+let
+  zenpkgs = sources.zen-browser.asFlake.packages.${final.system};
+in
+{
+  # TODO: upstream default is broken? They default to zen-twilight
+  "zen-beta-unwrapped" = zenpkgs."beta-unwrapped";
+  "zen-twilight-unwrapped" = zenpkgs."twilight-unwrapped";
+  "zen-twilight-official-unwrapped" = zenpkgs."twilight-official-unwrapped";
+
+  # default
+  "zen-beta" = zenpkgs."beta";
+
+  "zen-twilight" = zenpkgs."twilight";
+  "zen-twilight-official" = zenpkgs."twilight-official";
+}
diff --git a/npins/sources.json b/npins/sources.json
index 41eafa19..31edf218 100644
--- a/npins/sources.json
+++ b/npins/sources.json
@@ -368,6 +368,19 @@
       "revision": "6a96aa2066d8ad945f2323b63dc217081ef51168",
       "url": "https://github.com/Toqozz/wired-notify/archive/6a96aa2066d8ad945f2323b63dc217081ef51168.tar.gz",
       "hash": "02b8pva12rzcciq5lavwk824xaym28igfsva4kikvd7mxs06ccwx"
+    },
+    "zen-browser": {
+      "type": "Git",
+      "repository": {
+        "type": "GitHub",
+        "owner": "0xc000022070",
+        "repo": "zen-browser-flake"
+      },
+      "branch": "main",
+      "submodules": false,
+      "revision": "ef951ed2d976bcd1f57a09f358fdda9fa9425018",
+      "url": "https://github.com/0xc000022070/zen-browser-flake/archive/ef951ed2d976bcd1f57a09f358fdda9fa9425018.tar.gz",
+      "hash": "1s85cxiwhzwqgbazcgv12xqdlk1nkfynv23r9zj8gip4j6pznr4z"
     }
   },
   "version": 5