Customize Firefox controls, buttons and toolbars {web link}

Type about:customizing<enter> in the address bar.

Note: about:customizing is no longer present in Firefox 47+ releases.

• Press Alt or F10 to bring up the toolbar.
  Then View > Toolbars > Customize.
• Right-click on a blank spot in the toolbar and
  select Customize.

In the new window, look for the icon. When you find it, hold down the left button on it, and move it to where you want it to be. You can move any of the icons you want from here, but; some icons are locked in place.

There is also a Restore Defaults button at the bottom middle.

The Stop/Refresh button is not there either. I am attaching two screen shots. gollum-ff.png is FF on my laptop and sauron-ff.png is FF on my desktop. Both machines are running Linux, specifically CentOS 6. Both have firefox-60.7.0-1.el6.centos.x86_64 installed and have identical ~/.mozilla trees. What do I need to do to add the missing Stop/Refresh button. Without this button FF is basically unusable on sauron (my desktop), since I have dialup internet and need to be able to stop and refresh pages.

Are you possibly using code in userChrome.css that could hide this button?

• https://www.userchrome.org/what-is-userchrome-css.html
• https://www.userchrome.org/how-create-userchrome-css.html

Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration is causing the problem.

• switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Themes
• do NOT click the "Refresh Firefox" button on the Safe Mode start window

• https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode
• https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems

• if missing items are in the Customize palette then drag them back from the Customize window to the toolbar
• if you do not see an item on a toolbar and in the Customize palette then click the Restore Defaults button in the Customize palette window to restore the default toolbar set.

• https://support.mozilla.org/en-US/kb/customize-firefox-controls-buttons-and-toolbars
• https://support.mozilla.org/en-US/kb/navigation-buttons-missing

I am using userChrome.css, but even with the directory moved away, the button is missing. And restore defaults does not show the button.

What is totally strange is that the ~/.mozilla directory tree is identitical on *both* machines (I rsync'ed it). Both machines are running the same O/S and the same version of firefox.

I guess it is possible that hardware accel *could* be doing it, but even though sauron does have a nvidia video chipset, I am not using the nvidia drivers -- I am using the generic VGA driver, I presume without any hardware acceleration.

Because I am on dialup, I really, really, really, need the stop/refresh button. Otherwise, firefox is basically unusable on this machine.

Save mode is no help either.

Try the Firefox version from the official Mozilla server if you currently use a version from the repositories of your Linux distribution.

• https://www.mozilla.org/en-US/firefox/all/

You can try to reset browser.uiCustomization.state via the right-click context menu to the default value on the about:config page.

Try to rename/remove compatibility.ini in the Firefox profile folder with Firefox closed to invalidate the startup caches..

You can create a new profile to test if your current profile is causing the problem.

See "Creating a profile":

• https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles
• http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Profile_issues

If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over problems.

• https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile