Upgraded WordPress 3.2 on Firefox 3.6.18 – Some functions don't work

I’ve automatically upgraded WP 3.2, and am having the following problems:

1) Can’t log out – I click on the top right dashboard where it says “Howdy, …”, and it doesn’t give me a drop down menu. I also click Screen Options and Help, and it doesn’t drop down.

2) I can’t add tags on the post

3) I can’t insert a picture into the post

Since I’m using Mac 10.4.11, I can’t upgrade Firefox beyond what I’m using (version 3.6.18). Can someone tell me how I can easily revert back to WP 3.1? Thank you.