Hi AllisonDM, is your default search setting changing to Yahoo, or is it being ignored?

One possible culprit would be an extension. You can view, disable, and often remove unwanted or unknown extensions on the Add-ons page. Either:

• Command+Shift+a (Windows: Ctrl+Shift+a)
• "3-bar" menu button (or Tools menu) > Add-ons

In the left column, click Extensions. Then cast a critical eye over the list on the right side. All extensions are optional. If in doubt, Disable. If it's something you don't remember installing, try to Remove.

Often a link will appear above at least one disabled extension to restart Firefox. You can complete your work on the tab and click one of the links as the last step.

Any improvement?

I did what you suggested but I only had Pinterest pin image add-on I've had for much longer than this problem and BlockSite I just downloaded today and can't figure out how to use so I removed it and restarted. No change. The default page upon rebooting Firefox is Yahoo search.

AllisonDM said

The default page upon rebooting Firefox is Yahoo search.

That sounds like a different setting. Could you check whether that has been set as your home page? Either of these articles should point you to that part of the Preferences page:

• How to set the home page
• Startup, home page, tabs, and download settings

If the change works (you can test by launching a new window, Command+n) but is reverted at the next startup, check this article: How to fix preferences that won't save.

You know, I'm already happily married so my budding love for you will have to remain right here on these pages. Yes, the darned page was set as the home page and I changed it, rebooted Firefox, and it worked.

Thanks so much. You have made an otherwise irritating morning so much less prickly. :-)