Classic Theme Restorer 1.1.8 is a Firefox add-on that can restore the appearance of your browser to the pre-Australis appearance. The addon allows you to tweak the small parts of the Firefox browser so that it looks like the user interface in the old Firefox 29. It can be used to remove every single trace of the Australis look. It is also ideal for tweaking just some aspects of the Firefox browser.
You can customize the appearance of the tabs, application button and the user interface. You can set the maximum and minimum width of the tabs in the title bar. Some of the things that you can customize on the general user interface are stop and reload buttons, start button, small buttons on the navigation toolbar and back and forward button. You can combine the stop and reload buttons or have them removed from the interface.
You can customize the application button with a wide range of icons on the toolbars. You can customize the URL of the new tab for Firefox 41 and beyond. The tab loading animations can be customized. It allows you to open a new tab when the tab toolbar is being double clicked. It can show the version number of the addons starting from Firefox 40+. You can customize it to display the bookmarks star and RSS feed buttons on the location bar.
You can change the title of the tab in the title bar of the Firefox browser. You can hide the navigation toolbar and customize the background color of the alternative panel. You will be able to create a custom color scheme for the text and background of the tabs. The tweak will apply as soon as you tick a checkbox in the settings of the Classic Theme Restorer. It allows you to create a custom tab separator.
Download link: https://addons.mozilla.org/en-US/firefox/addon/classicthemerestorer/versions/?page=15