I'm running WinXPSP3 on an older laptop with Firefox 48.0.2. Viewing
Tools > Add-ons now displays a message that states "You don't have any
add-ons of this type installed." referring to extensions. However, I
have several installed and they appear to be running fine. I just can't
see them in the extensions management page. For example, I'm using
Setting Sanity, Old Location Bar, Disconnect and Prevent Tab Overflow as
well as a couple of others I don't remember right now.
How can I get the management page to recognize the extensions again? I
tried running the browser in safe mode and then switching back, but that
didn't help even though it's worked for other problems in the past.
Thanks in advance.