By default, Firefox 52.9.0esr may try to update itself. Because newer versions do not work on Vista, this will break your browser. You must disable automatic updates immediately.
It is highly recommended to download this version from the official Mozilla archive to avoid malware. Navigate to the official . Choose your language folder (e.g., en-US for English-US). Download the Firefox Setup 52.9.0esr.exe file. Step-by-Step Installation Guide By default, Firefox 52
In Firefox, click the menu button (three horizontal lines) and select (or Options). Go to General . Scroll down to Firefox Updates . By default, Firefox 52