I just installed the new firefox and now everytime I want to add a new tab by clicking ctrl and left mouse button, I get the tab, but the previous site I was on zooms one size. Is there any way to fix this. Is there anything I need to disable?
This doesnt seem to be any issue when I do the same thing in IE so its not a keyboard or mouse issue as far as I can see.
Thank you guys for any help

Update: it also does this if I right click and choose open in new tab