Hi pclind, this is probably related to extensions. You can try it out easily by starting Firefox in Safe Mode. Here is how: Diagnose Firefox issues using Troubleshoot Mode

It could also be the Java Plug-in. I'd just disable Java, if you don't really need it, most people don't. Here is how: How to turn off Java applets

Hope that helps.

I tried the two suggestions. Turning of java didn't make any difference. But running in safe mode with no plug-ins did work. These messages popping 4-6 times every time a page is loaded, started when I upgraded to beta 17.0 from the previous beta release.

If it does work in Firefox Safe-mode then disable all extensions (Tools > Add-ons > Extensions) and then try to find which is causing it by enabling one extension at a time until the problem reappears.

Close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")

See also:

• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

I found the problem to be in the extension SocialFIxer 7.201. I have notified the author on his Facebook page https://www.facebook.com/Socialfixer Matt also has info on his website at http://socialfixer.com/

Thanks for the info on how to track it down!

No more pop-ups! Thanks for letting the Social Fixer people know.

Thanks for the suggestion. I was using Social Fixer 6.751 and disabled it. Now Firefox 17.0 is happy again!

I was having the error Java Error message: evalInSandbox:SyntaxError: syntax error. Social Fixer has it corrected in version 7.301, and I am using Firefox 17.0 beta with Social Fixer 7.301 and not having any more of the errors.

I get the huge wave of Java messages since I upgraded to 17. Tried to revert to 16. That didn't work. I don't have SocialFixer Installed, or at least it's not in my add-ons list. And now I can't run except with all add-ons disabled.

Looks like it might be time to switch browsers again.

wait, I take that back, I started up with all add-ons off, and the java messages still abound. Wow. Just wow.

I had this problem. It started happening this evening. By simply doing a System Restore the problem went away. Genius huh?

I don't have Social Fixer. How do you do a System Restore? This Java message drop down is sooooo annoying.