diff --git a/users/willifan/applications.nix b/users/willifan/applications.nix
index a93cc56..ad6be59 100644
--- a/users/willifan/applications.nix
+++ b/users/willifan/applications.nix
@@ -25,5 +25,4 @@
     virtualbox
 
   ];
-
 }
diff --git a/users/willifan/graphical/firefox.nix b/users/willifan/graphical/firefox.nix
index 38f61f3..2e090fe 100644
--- a/users/willifan/graphical/firefox.nix
+++ b/users/willifan/graphical/firefox.nix
@@ -12,16 +12,11 @@
             "browser.search.defaultenginename" = "DuckDuckGo";
             "browser.search.order.1" = "DuckDuckGo";
             "media.videocontrols.picture-in-picture.video-toggle.enabled" = false;
-            "extensions.pictureinpicture.enable_picture_in_picture_overrides" = false;
-            "signon.management.page.breach-alerts.enabled" = false;
-            "signon.rememberSignons" = false;
-            "browser.startup.page" = 3;
             "browser.aboutConfig.showWarning" = false;
             "browser.bookmarks.restore_default_bookmarks" = false;
             "browser.contentblocking.category" = "standard";
             "browser.toolbars.bookmarks.visibility" = "never";
             "browser.translations.panelShown" = false;
-            "browser.uiCustomization.state" = "{\"placements\":{\"unified-extensions-area\":[\"sponsorblocker_ajay_app-browser-action\",\"ublock0_raymondhill_net-browser-action\",\"_762f9885-5a13-4abd-9c77-433dcd38b8fd_-browser-action\"],\"nav-bar\":[\"back-button\",\"forward-button\",\"stop-reload-button\",\"customizableui-special-spring1\",\"urlbar-container\",\"customizableui-special-spring2\",\"downloads-button\",\"unified-extensions-button\",\"simple-tab-groups_drive4ik-browser-action\",\"firefox-enpass_enpass_io-browser-action\"],\"toolbar-menubar\":[\"menubar-items\"],\"TabsToolbar\":[\"tabbrowser-tabs\",\"new-tab-button\"],\"PersonalToolbar\":[]},\"seen\":[\"save-to-pocket-button\",\"developer-button\",\"firefox-enpass_enpass_io-browser-action\",\"ublock0_raymondhill_net-browser-action\",\"simple-tab-groups_drive4ik-browser-action\",\"sponsorblocker_ajay_app-browser-action\",\"_762f9885-5a13-4abd-9c77-433dcd38b8fd_-browser-action\"],\"dirtyAreaCache\":[\"nav-bar\",\"PersonalToolbar\",\"toolbar-menubar\",\"TabsToolbar\",\"unified-extensions-area\"],\"currentVersion\":20,\"newElementCount\":2}";
           };
           search = {
             force = true;
@@ -43,3 +38,5 @@
 }
 
 
+
+#user_pref("extensions.pictureinpicture.enable_picture_in_picture_overrides", true);
diff --git a/users/willifan/graphical/hyprland/common/hyprland.nix b/users/willifan/graphical/hyprland/common/hyprland.nix
index b403af2..9c4d244 100644
--- a/users/willifan/graphical/hyprland/common/hyprland.nix
+++ b/users/willifan/graphical/hyprland/common/hyprland.nix
@@ -44,7 +44,7 @@
 
             touchpad.natural_scroll = "yes";
             
-            sensitivity = -0.8; # -1.0 - 1.0, 0 means no modification.
+            sensitivity = 0; # -1.0 - 1.0, 0 means no modification.
             numlock_by_default = 1;
             special_fallthrough = true;
         };
diff --git a/users/willifan/graphical/thunderbird.nix b/users/willifan/graphical/thunderbird.nix
index a0d1859..2eb477d 100644
--- a/users/willifan/graphical/thunderbird.nix
+++ b/users/willifan/graphical/thunderbird.nix
@@ -40,7 +40,6 @@
             "mail.account.account1.server" = "server1";
             "mail.account.account2.server" = "server2";
 
-            "mail.biff.play_sound" = false;
             "mail.accountmanager.accounts" = "account1";
             "mail.accountmanager.defaultaccount" = "account1";
             "mail.accountmanager.localfoldersserver" = "server2";