
Now you have successfully updated Firefox to the new version using the small partial MAR update file.

If it has succeeded near the very end, then update process has been a success. In the update folder ( D:\Update) check the update.log file.Open an elevated command prompt (press Win+X and then select Command Prompt (Admin)) and then give the following command:ĭ:\Update\updater.exe D:\Update "C:\Program Files\Mozilla Firefox\" "C:\Program Files\Mozilla Firefox\".Copy the downloaded MAR file (step 2 above) in the same folder ( D:\Update) and rename it to update.mar.Copying of the updater.ini is optional, it is just for showing a update progress. Copy updater.exe and updater.ini from Firefox installation folder and paste them in the update folder D:\Update.Typically, it is C:\Program Files\Mozilla Firefox. This will open the installation folder where Firefox is installed. Right-click on the Firefox shortcut on your Windows desktop and select Open file location.Choosing a wrong architecture or MAR file will result in update failure. The MAR files are named to tell you which old version can be updated to which new version. Inside that version directory, you will find an update folder where you can find the MAR files in various sub-folders.


If you cannot wait, then you can either download the full installer for the new version and install it on your system, or you can download a smaller partial update MAR (Mozilla Archive) file and manually update your Firefox browser. Whenever Mozilla releases a fresh new update for the Firefox web browser, it is made available on their FTP server many hours before you actually receive the update through automatic updates.
