Major refactor to flake, abstract non-trivial packages into their own

files (such as firefox/spotify-qt+librespot), create utils for reusable
function library

nix/home/common/firefox.nix

@@ -0,0 +1,96 @@
+{
+  pkgs,
+  nur,
+  ...
+}:
+{
+  programs = {
+    firefox = {
+      enable = true;
+      package = pkgs.firefox-wayland;
+
+      policies = {
+        "DisableFirefoxStudies" = true;
+        "DisableTelemetry" = true;
+      };
+
+      profiles = {
+        default = {
+          isDefault = true;
+          name = "DefaultProfile";
+          userChrome = ''
+            @import "theme/nordic-theme.css";
+            @import "theme/hide-single-tab.css";
+            @import "theme/matching-autocomplete-width.css";
+            @import "theme/system-icons.css";
+            @import "theme/symbolic-tab-icons.css";
+
+            @import "customChrome.css";
+          '';
+
+          extensions = {
+            packages = with nur.repos.rycee.firefox-addons; [
+              ublock-origin
+              bitwarden
+              vimium
+              privacy-badger
+              clearurls
+              darkreader
+            ];
+          };
+
+          settings = {
+            "browser.startup.homepage" = "https://search.nixos.org";
+            "browser.shell.checkDefaultBrowser" = false;
+            "privacy.resistFingerprinting" = false;
+            "dom.security.https_only_mode" = true;
+            "browser.tabs.warnOnClose" = false;
+            "extensions.pocket.enabled" = false;
+            "browser.search.defaultenginename" = "ddg";
+            "gfx.webrender.all" = true;
+            "toolkit.legacyUserProfileCustomizations.stylesheets" = true;
+            "browser.tabs.allow_transparent_browser" = true;
+          };
+
+          search = {
+            force = true;
+            default = "ddg";
+            order = [
+              "ddg"
+              "google"
+            ];
+            engines = {
+              "ddg".metaData = {
+                alias = "@d";
+                hidden = false;
+              };
+              "google".metaData = {
+                alias = "@g";
+                hidden = false;
+              };
+              "Nix Packages" = {
+                urls = [
+                  {
+                    template = "https://search.nixos.org/packages";
+                    params = [
+                      {
+                        name = "type";
+                        value = "packages";
+                      }
+                      {
+                        name = "query";
+                        value = "{searchTerms}";
+                      }
+                    ];
+                  }
+                ];
+                icon = "${pkgs.nixos-icons}/share/icons/hicolor/scalable/apps/nix-snowflake.svg";
+                definedAliases = [ "@np" ];
+              };
+            };
+          };
+        };
+      };
+    };
+  };
+}