No yahoo toolbar
I keep getting a msg one or more add ons cannot be verified and have been disabled. I don't know what that means. I'm not a computer person. I get the toolbar, but after i sign out and go back on that's when the msg appearance.
Chosen solution
Followup: The Yahoo toolbar add-on has been updated. The latest version fixes the problem. If you have set the xpinstall.signatures.required preference to false in the Firefox Configuration Editor (about:config page) as a workaround, you can go back now and reset the preference to true.
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This is probably cause by Add-on signing in Firefox. What add-ons are affected and do you really need and use them?
I have no idea how these add ons got there. How do i remove them?
Please see Disable or remove Add-ons. You can also Refresh Firefox - reset add-ons and settings, if you do not use any add-ons or themes at all.
The Yahoo toolbar add-on becoming disabled in Firefox 43 is a known issue that Mozilla and Yahoo are working on. In this particular case you can follow the instructions for advanced users in the Add-on signing in Firefox article (toggle the xpinstall.signatures.required preference to false in the Firefox configuration Editor) but this is only a temporary solution which will no longer work in Firefox 44.
Modified by AliceWyman
Chosen Solution
Followup: The Yahoo toolbar add-on has been updated. The latest version fixes the problem. If you have set the xpinstall.signatures.required preference to false in the Firefox Configuration Editor (about:config page) as a workaround, you can go back now and reset the preference to true.