packages: Add new-tab-identity

This seems to work, which is great.

For some reason it wasn't being initialized properly inside the virtual
machine but it does work on actual devices.

home/librewolf.nix

@@ -23,6 +23,7 @@ in
         ublock-origin
         yomitan
         redlib
+        new-tab-identity
       ];
 
       search = {

packages/new-tab-identity.nix

@@ -0,0 +1,34 @@
+{
+  lib,
+  buildNpmPackage,
+  fetchFromGitHub,
+}:
+
+buildNpmPackage {
+  pname = "new-tab-identity";
+  version = "0-unstable-2024-08-19";
+
+  src = fetchFromGitHub {
+    owner = "donovanglover";
+    repo = "new-tab-identity";
+    rev = "bf61dbda21d37b063062039ca246611ee83299ff";
+    hash = "sha256-/1id7MHWxkPpuiSWqLYGYQBk5kNxBOUbkexkvTZDkfw=";
+  };
+
+  npmDepsHash = "sha256-M0WPgg91FupGz4383gHf13kSsmAkjygmKZ5IxsM3VE0=";
+
+  installPhase = ''
+    runHook preInstall
+
+    install -Dm644 dist/new_tab_identity-1.0.zip "$out/share/mozilla/extensions/{ec8030f7-c20a-464f-9b0e-13a3a9e97384}/some-name@example.org.xpi"
+
+    runHook postInstall
+  '';
+
+  meta = {
+    homepage = "https://github.com/donovanglover/new-tab-identity";
+    description = "Browse the web from multiple VPN locations simultaneously";
+    maintainers = with lib.maintainers; [ donovanglover ];
+    platforms = lib.platforms.all;
+  };
+}