Firefox on iMac

Hi...

See if you have your Domain guessing turned off:

Domain Guessing

If you enter an incomplete URL, Firefox can try to "fix up" the URL by adding a prefix, suffix, or both to what you type. For example, if you type www.microsoft in the Location Bar, Firefox will append .com to complete the URL. If you type mozilla.org, Firefox will prepend www. to complete the URL. This "guessing" is secondary to the web search in the address bar described above - it does not work unless the web search in the address bar is turned off.


Turning off Domain Guessing

You can turn off Domain Guessing by changing a preference.

1. In the Location bar, type about:config and press Enter.
   • The about:config "This might void your warranty!" warning page may appear. Click I'll be careful, I promise! to continue to the about:config page.
2. In the Search field, type fixup.
3. Double-click the browser.fixup.alternate.enabled preference to set its value to false.

https://support.mozilla.org/en-US/kb/search-web-address-bar