you just get an extra thingy in the row of File edit view etc which says "gamerenders" with all the gr links in it evrox And yes, please make one for 1.5 im missing it badly I CANT LIVE WITHOUT IT PLZPLZPLZ MAKE ONE!!!
Edit: I will be revamping this extension to work with newer versions of Firefox, along with that I will be editing it to include all of the newer features of GR.