Google toolbar back on firefox 5.0 : Follow instructions.

I am using windows XP:
Go to mozilla firefox folder in your program files. find extensions folder, and enter in folder named something like that {972ce4c6-7e08-4474-a285-3208198ce6fd}. Now find install.rdf file, open it in notepad and find maxVersion 5.0 and change 5.0 to 6.0.

Now Enjoy your Google toolbar for Firefox 5.0