hello hamguy, this sounds like a problem possibly caused by adware/malware on your pc. please go to firefox > addons > extensions & remove any suspicious entries (toolbars, things that you have not installed intentionally, don't know what purpose they serve, etc). also go to the windows control panel / programs and remove all toolbars or potentially unwanted software from there and run a full scan of your system with the security software that you have in place and different other tools like the free version of malwarebytes & adwcleaner.

Remove a toolbar that has taken over your Firefox search or home page Troubleshoot Firefox issues caused by malware

Where do I find the firefox> etc. I looked in the Program Files under Mozilla firefox but it's not there. I really think this problem is from installing rev. 23, never had it before. Is this a common problem with rev 23? If so, l'm going back to IE.

Where do I find the firefox> etc. I looked in the Program Files under Mozilla firefox but it's not there. I really think this problem is from installing rev. 23, never had it before. Is this a common problem with rev 23? If so, l'm going back to IE.

Hi hamguy, if you use the classic menu bar, it's on the Tools menu.

Tools menu > Add-ons > Extensions category

If you use the compact two-column menu (orange Firefox button) then

orange Firefox button > Add-ons > Extensions category

And no, it's not part of Firefox.

By the way, double-underlined words that trigger little ads on mousing over may be site-specific, but if you see it everywhere, it's probably one of the many "free" add-ons that embed TextEnhance. Last Summer, it was in an extension named VideoFileDownload, and articles on other sites identified numerous other culprits.

I suggest disabling ALL nonessential or unrecognized extensions:

orange Firefox button (or Tools menu) > Add-ons > Extensions category

If in doubt, disable, then use of the links that usually appears above a disabled extension to restart Firefox.

If you want to ask about whether a particular extension is trustworthy, you can copy/paste from this page:

Help > Troubleshooting Information > "Copy text to clipboard" button

Note: when pasting into a reply, you can scroll down and delete Important Modified Preferences and everything that follows that.

Last but not least, this could be part of a larger package of unwanted software. You may want to run some supplemental scans. These three tools are highly regarded (and free):

• Malwarebytes Anti-malware : http://www.malwarebytes.org/products/malwarebytes_free
• SUPERAntiSpyware : http://www.superantispyware.com/
• AdwCleaner : http://www.bleepingcomputer.com/download/adwcleaner/ (ignore banner ads for other products)