No apparent reason, the toolbar of the add-on disappeared. After opening view/toolbars and customize the add-on toolbar appears immediately. However, once I click on 'Done '. the toolbar disappears again. Please advise possible solution.

Windows 7 operating system and the latest version of the FF browser.

Start Firefox in Firefox to solve the issues in Safe Mode to check if one of the extensions of the origin of the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > appearance/themes).

Tags: Firefox

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