Hi Bob, your question ended up under iOS -- the OS for iPhone and iPad. If this problem if on your Mac, a moderator can move your question. Just let us know. Of course, Bing is a built-in search option, but it should not just take over. Here are some things to check as to why it's asserting itself: '''Default Search Engine Setting''' Firefox usually has Google as the default. The article "[[Change your default search settings in Firefox]]" has the steps to check and update that setting if needed. If this setting is not stable, is there a pattern to when it changes? For example, when you exit/quit Firefox and start it up again? Or when you restart your system? '''Startup (Home) Page Setting''' If your startup/home page was changed to Bing, this is a separate setting. More info in the following article: [[How to set the home page]]. Also check your add-ons as described at the end of this post. Sometimes malware will modify your browser shortcuts with a URL to open at startup. More info on that if needed, but also, supplement your regular security software with some additional scans: [[Troubleshoot Firefox issues caused by malware]]. '''New Tab Page''' There are some add-ons that change your new tab page to Bing. Check your add-ons as described at the end of this post. '''Search Hijack''' In the extreme case, when you type your query in the address bar and the top line of the drop-down says "Search with Google" you may get results on a different site. Check your add-ons as described at the end of this post. See also: [[What to do when searches take you to the wrong search website]]. ---- 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 * type or paste '''about:addons''' in the address bar and press Enter/Return In the left column of the Add-ons page, click Extensions. On the right side, find the "Manage Your Extensions" heading. Then cast a critical eye over the list below that heading. Any extensions Firefox installs for built-in features are hidden from this page, so everything listed here is your choice (and your responsibility) to manage. Anything that mentions search or privacy? Anything suspicious or that you just do not remember installing or why? If in doubt, disable (or remove). For your privacy and security, don't let mystery programs linger here. Any improvement?