when addons are updated, FF restarts and the websites of the updated addons open in tabs to let u know those addons were updated and to be able to check their website fa further info (changelog, etc)... however firefox is now opening addon sites (first only from download helper and now including tab mix plus), even tho those addons werent updated... i have a screenshot i can send if its possible... this only happens when firefox first opens, as long as its open, any other instances of firefox open correctly with just a blank tab and no other website tabs... i downgraded to FF v16 bc i cant get tab mix plus in 17 and i hate how firefox handles tabs, so i will not upgrade until tab mix plus works with v 17...as an aside...i always use the previous version of FF until tab mix plus works with whatever th current version is...