Update bookmark behavior

user.js

 
 /* Behaviour */
 user_pref("browser.bookmarks.openInTabClosesMenu", false); // opening bookmarks doesn't close menu
+user_pref("browser.tabs.loadBookmarksInBackground", true); // allow opening bookmarks in background
 user_pref("layout.word_select.eat_space_to_next_word", false); // don't select extra space after words
 user_pref("general.autoScroll", true); // scroll on middle click
 user_pref("browser.tabs.searchclipboardfor.middleclick", false);