hello modeldad, could you go to firefox > help > troubleshooting information, copy the contents of that page and paste them here into a reply on the forum? this might give us a clue what is going on.

a screenshot of the issue could come handy as well...

How do I create a screenshot of my problem?

It seems to be running normally now. I could not even get to troubleshooting.

Not sure what info you need from TS.

I got into my extension, and it looks like Block Site 1.1.8 had taken over.

I am going to disable it and see if the problem appears again.

I use Block Site. Check its black and white listings. Have you used any wild card symbols (? / *). Can you give an example of what is blocked? Also a copy of the blocked list from Block Site. A screen shot of the latter will do.

No symbols, and only one site actually and correctly blocked.

Everything was blocked.

Did you try disabling Block Site? Also try to disable Add-Block and its companion add-ons. Then try to get on this site to see if it goes or not. If there is still a problem, start Firefox in safe mode and try again with this web site.

No, as it seems only Block Site was involved. I work with one problem at a time. No reason to disable other add-ons if they do not exhibit issues. The notice i got was clearly from Block Site. Why it went rogue, I have no idea. But it has been fine since I limited it.

I once had a problem with Firefox not working properly. After a lot of doing this and doing that, I discovered the problem was that two of my add-ons were in conflict with each other. If you use safe mode, and the problem is gone, then you have narrowed down the cause.