I tried to google the problem for a while and still couldn't find the solution.

My browser periodically open a new tab with a Facebook link even when the browser is not opening. First I guess that's because of Firefox, so I reinstalled Firefox (keeping the profile). Not thing changed.

Now I need your helps.

Also, I'm not sure the link is an ad or not but it's doesn't matter much, it's annoying anyway.

-----------Update-------------

Remove Firefox -> not worked

Dump the profile -> not worked

The problem disappeared by itself. Not sure how..