Type about:addons<enter> in the address bar to open your Add-ons Manager. Hot key; (<Control> [Mac=<Command>] <Shift> A)

In the Add-ons Manager, on the left, select Extensions. Remove “ Bing “ Anything.

Also remove SafeSearch, SearchAssist Incognito, FileConverter Addon, SearchLock, DiscreteSearch, WebSearch, Findwide Search Engine

Now do the same in the computer’s Programs Folder.

Windows: Start > Control Panel > Uninstall Programs. Mac: Open the Applications folder. Linux: Check your user manual.

Regarding part 2 of the above:

FredMcD said

Now do the same in the computer’s Programs Folder.

• Windows: Start > Control Panel > Uninstall Programs.
• Mac: Open the Applications folder.
• Linux: Check your user manual.

More specifically, find your way to this folder:

/Applications/Firefox.app/Contents/Resources/defaults/pref

A file named channel-prefs.js is normal here. Any other file in this folder is suspicious if you do not remember creating it yourself. Remove any such files to a neutral location for further analysis at your leisure.

Followed the above and none of the contents were unusual but issue remains

mplsjohn Please go to the top of any support.mozilla.org web page and use the Get Community Support link: https://support.mozilla.org/en-US/questions/new

Select the product for what the problem is (Firefox or whatever). Now select the category for the problem. At the bottom is Other.

Describe the problem in brief (one line). Then press <enter>. The website will display any prior posts that might help you. If nothing on the list can help, at the bottom press the button; None Of These Solve My Problem.

Now enter all the relative information on the problem. At the bottom of this, you can Add Images.

Under this is Troubleshooting Information. Please press the Share Data button. This will let us look at your system details. No Personal Information Is Collected.