I don’t even have the maintenance service installed, and it still updates!
Don’t browsers have to update to remain secure?
Doesn’t Microsoft have to update to remain secure?
Use the Addon “NoScript”. Stop scripting and it won’t download without specific permission.
If installed, “Mozilla Maintenance Service” should appear as “MozillaMaintenance” in the list of Services, in the Windows Task Manager window.
If your version of Mozilla Firefox is 27.0.1, “Mozilla Maintenance Service” should have at least been installed with that version ... according to online info.
There is also an application, “updater.exe”, here:
C:\Program Files (x86)\Mozilla Firefox\Updater.exe
Perhaps (I sure do not know), moving it to some temporary folder, will prevent the automatic updating?
As a test, I moved it, just to see if Mozilla Firefox would balk ... but Firefox (version 27.0.1) seemed to run OK.