Opera's a good standards-compliant browser. Generally, any browser that's updated frequently and isn't IE is a good choice. All browsers keep user data in some sort of profile. The others aren't as well publicized as Firefox's, and I don't know if they're known to cause the issues that Firefox's profile can cause at times or not. The non-intuitive aspect of all this is that people try uninstalling and reinstalling Firefox without it doing any good. When they replace their profile, it generally does a lot of good. Mozilla wants to add the ability to fix profiles during the installation process. I don't think there's any work being done at this point, meaning that I wouldn't expect to see such a feature until at least Firefox 8. Replacing a Firefox profile (for most users) isn't as hard as the quote above makes it out to be. Generally, you can export your bookmarks and your move your old profile out to your desktop (in case you have to put it back). Firefox will automatically create a fresh profile, and you and import your old bookmarks. Once you're happy with your new profile, the old one can be deleted. It gets hairier if you have a lot of custom settings and extensions. It's not hard to re-add extensions, though. And if settings changes are complicated, they can be backed up with Firefox Sync, which is built into Firefox 4 and above and available as an extension for Firefox 3.5 & 3.6. If you have an automatic backup routine, it's generally easy to revert to an earlier Firefox profile that's known to be good. I get adventurous at times and do things I regret. Restoring a backup is a quick and easy way to fix the issue. By the way, if you're still running Firefox 3.5, it should be updated immediately, preferably to Firefox 4. Its final update occurred a few weeks ago, meaning that it'll no longer get security fixes. Mozilla is actually going to force a major update on 3.5 users in a month, as long as they have automatic updates turned on. That's the first time a browser maker has ever made a decision to do that.