Run the helper.exe file located in C:\Program Files\Mozilla Firefox\uninstall\.

Hello, Just a question, what made you want to install it? Anyways, to uninstall it, follow these steps : Windows : Close Firefox completely Open Settings Navigate to Apps > Installed apps (or "Apps & features"). Uninstall Search for "Firefox", click the three dots (or the app entry), and select Uninstall. Remove Leftover Data (Optional): Press Windows Key + R, type %appdata%, and delete the Mozilla folder. Mac: : Close Firefox (quit) Open the Applications folder, find Firefox, and drag it to the Trash. Empty Trash If it still doesnt work for windows, try this : Run the helper.exe file located in C:\Program Files\Mozilla Firefox\uninstall\.