fixup! Firefox preference overrides.

Bug 41736 - Stop setting the browser.uiCustomization.state preference.

browser/app/profile/001-base-profile.js

@@ -464,9 +464,6 @@ pref("intl.multilingual.downloadEnabled", false);
 // Disk activity: Disable storage.sync (tor-browser#41424)
 pref("webextensions.storage.sync.enabled", false);
 
-// Toolbar layout
-pref("browser.uiCustomization.state", "{\"placements\":{\"widget-overflow-fixed-list\":[],\"PersonalToolbar\":[\"personal-bookmarks\"],\"nav-bar\":[\"back-button\",\"forward-button\",\"stop-reload-button\",\"urlbar-container\",\"downloads-button\"],\"TabsToolbar\":[\"tabbrowser-tabs\",\"new-tab-button\",\"alltabs-button\"],\"toolbar-menubar\":[\"menubar-items\"],\"PanelUI-contents\":[\"home-button\",\"edit-controls\",\"zoom-controls\",\"new-window-button\",\"save-page-button\",\"print-button\",\"bookmarks-menu-button\",\"history-panelmenu\",\"find-button\",\"preferences-button\",\"add-ons-button\",\"developer-button\"],\"addon-bar\":[\"addonbar-closebutton\",\"status-bar\"]},\"seen\":[\"developer-button\"],\"dirtyAreaCache\":[\"PersonalToolbar\",\"nav-bar\",\"TabsToolbar\",\"toolbar-menubar\"],\"currentVersion\":14,\"newElementCount\":1}");
-
 // Enforce certificate pinning, see: https://bugs.torproject.org/16206
 pref("security.cert_pinning.enforcement_level", 2);