How to stop Bing appearing on my Firefox

Don’t know if this is the correct forum. Bing has taken over my Firefox. I have tried many remedies. There is no sign of Bing on control panel. I have reset Firefox as default every way I know. But Bing still appears and there is no sign of any Firefox options or tools. Can anyone help?

Hi Melanie! This Discourse site is mostly for Mozilla contributors. If you need to ask a question about Firefox, please visit the support site.

Melanie,

You want to start here -
https://support.mozilla.org/en-US/kb/search-bar-add-change-manage-search-engines-firefox

That article should give you what you need to change the settings back.
When you install new programs be careful to watch for checkboxes “make x my
default search engine” for example when downloading flash there is always
an offer to install McAfee.

If that article doesn’t help you, then click on the “ask a question” link
on the support site to get 1:1 help.