Software Fixes Hardware Fixes Community Q&A There are many reasons why Internet connections seem to slow down over time.
Software Update problems can sometimes be resolved by simply restarting the computer and then reopening your Mozilla application.Either install the Update Channel Changer, or open Only the // on the first line is important because it is a comment.If the value in about:config has still not changed, then right click and reset the preference - this removes the profile value that is masking the application one. This is no longer the case and in fact now that preference is almost ignored.For example, on Windows 7, the files "active-update.xml", "updates.xml", and the "updates" folder can be found in one of these locations  (using Firefox in the first example).
Note: You'll need to show hidden files and folders to find these locations: A Software Update "Update Failed" error, Something is trying to trick Firefox into accepting an insecure update.
Related bug reports include: Updates can be retrieved from a number of different update channels.