I have followed the instructions here https://wiki.mozilla.org/Software_Update:Manually_Installing_a_MAR_file to update Firefox using the mar files made available. This works fine - firefox is updated and shows as succeeded in the update.status file created. I then run the after install helper process and this updates firefox to the correct version in add/remove programs (before running this step, looks like firefox is upgraded correctly but still showing old version in add/remove programs). If however I click on the maintenance service and look at the version, it still shows the version from which it was upgraded. Everything appears to work fine however I am concerned that this might cause an issue for future updates? If I update firefox manually (by going to Help -> About Firefox), then the maintenance service version is also updated as expected. If I look at the look at the properties of the maintenanceservice.exe program in the firefox folder, it is correct on the latest version. I have tested this on windows xp (32 bit). Any suggestions?