Sorry, couldn't help myself ;-) I have been using Firefox for years with no problem.  My wife uses Firefox with no problems.  My Mom uses Firefox with no problems.

I do have Chrome and Opera on my desk computer as well, with a totally different set of addresses on the toolbar for a different purposes.  One is my bill paying browser.  All the one touch toolbar buttons go to bill paying web sites.

 I IE set up on my laptop for my 9 year old grandson to use. Some kid site he likes works better with IE. The only bookmarks on IE are the ones he uses.