To return to the config menu later without any typing, just create a bookmark to it. After the menu comes up, create a bookmark by pressing Ctrl + D on PC, or ⌘ Command + D on Mac.
Another way to search is by clicking on any of the settings under the Preference Name once, and pressing the j key. You’ll automatically jump down the page to the first setting that begins with “j. " Continue typing javascript to move further down the list to the option you want.
You can also press F5 on PC and Mac to refresh your browser.
Many issues stem from out-of-date plugins. You can bring your plugins up to speed all at once by clicking Check to see if your plugins are up to date at the top of the Plugins page.
You don’t have to restart Firefox after enabling or disabling a plugin.