Firefox Tabbed browsing problems

I'm having problems with firefox and almost everytime I open a new tab the page webpage will keep shaking up and down. I was thinking of completely removing firefox and then reinstalling it, but I'm not sure how to get rid of my firefox profile which causes the problem all over again after reinstalling it.

 

Locate your profile folder

Knowing where your profile folder is stored can be useful if, for example, you want to make a backup of your personal data.

* On Windows XP/2000, the path is usually %AppData%\Mozilla\Firefox\Profiles\xxxxxxxx.default\, where xxxxxxxx is a random string of 8 characters. Just browse to C:\Documents and Settings\[User Name]\Application Data\Mozilla\Firefox\Profiles\ and the rest should be obvious.
* On Windows 95/98/Me, the path is usually C:\WINDOWS\Application Data\Mozilla\Firefox\Profiles\xxxxxxxx.default\
* On Linux, the path is usually ~/.mozilla/firefox/xxxxxxxx.default/
* On Mac OS X, the path is usually ~/Library/Application Support/Firefox/Profiles/xxxxxxxx.default/

%AppData% is a shorthand for the Application Data path on Windows 2000/XP. To use it, click Start > Run..., enter %AppData% and press Enter. You will be taken to the "real" folder, which is normally C:\Documents and Settings\[User Name]\Application Data.

 

Do you have an empty Bookmarks Toolbar? That will cause this symptom - either put a bookmark in the toolbar or go to View > Toolbars and uncheck Bookmarks Toolbar to hide it.