I tried for two days to send feedback. Not only is my Google toolbar gone, they have completely screwed up bookmarks. The bookmarks page is so wide, by the time you get to your file you lose your place. Then if you have lots of sites in a file a new messy screen pops up and it's hard to get out of it. Not does the feedback not work, I had to log in 3 times before it worked.

Google needs to update the Google Toolbar program for Firefox 5.0.

The Google Toolbar 7.1.20110512W version does work in Firefox 5.0 by using the Compatibility Reporter extension, I tried it myself due to the large number of postings about GTB problems.
https://addons.mozilla.org/en-US/firefox/addon/add-on-compatibility-reporter/

As far as the wide bookmarks drop-down display, it adjust to the width of the wordiness of the longest bookmark name. AFAIK, that change only affects Mac users. Edit that name to make it shorter and the width will narrow.

I have many folders of bookmarks. In 4.x, I could scroll down the list of them, get to the desired one, a list of its contents appeared to the side, by moving the cursor over there I could select one of those, in the case of subfolders, same behavior.

Version 5.0 breaks this. When I scroll down the list of bookmarks, sometimes the contents list of the folder appears *over* the top-level list, and this happens really fast, so that it obscures the main list, and I can not get the cursor out of there, except by returning all the way to the top, and trying again. Other times the contents list appears to the side, so the main list is not obscured, but yet I can not select another folder. The only choice is one of the contents list. No other folder is selectable, except by going to the top again, or above/below the displayed contents list of the one folder.

I simply an unable to move the cursor as fast and accurately (and I am relatively fast) as is needed to get to the correct folder before a contents list displays.

The advantage of the old 4.x behavior was that the contents of each folder displayed to the side, so I could scroll through the bookmarks list, see the contents before select something. This new 5.0 behavior makes using folders near impossible.

Thanks for your reply and others in this thread. Bottom line is that Mozilla needs to make sure that all of the common interfaces and add ons like Google toolbar and Norton autofill work before releasing a new version. I hope someone who makes these decisions at Mozilla is listening. I do appreciate all the development work on Firefox, and especially to have an alternative to the Microsoft monopoly, but unfortunately new software releases that break stuff that used to work is one of the reasons users wanted alternatives to Microsoft software in the first place. I realize that testing every existing add on with a new version is not possible, but certainly the popular ones could be. And what are the popular ones? Hey, how about a user survey -- what a concept! I am sticking with the older version of the browser until they fix the problems. I am concerned about their plan to issue updates frequently and automatically creating endless hassles for the user.