 how to fix so it appears that there are two different fixes one of them completely removes fireshot and the second leaves fireshot installed both appear to work fix 1 uninstall fireshot 0 31 restart firefox enter about config in the address bar search for any variables that contain fireshot i think this is the one that is causing the problem general useragent extra fireshot right click on each one and select reset if you want re install fireshot version 0 25 fix 2 open the fireshot preferences uncheck add information about fireshot into user agent string restart firefox so a couple of my firefox add ons had updates this morning i installed them all without even thinking about it and my co worker adrian asked why i added the green background to my sifr headings i had no idea what he was talking about he said he also had a firefox add on that was updated fireshot i checked in firefox on the mac ie and another co workers firefox on pc and none of them had the green backgrounds i disabled javascript and the green backgrounds went away so something is going on with my sifr headings weird anyone else seeing the green backgrounds anyone know why 