hello, this sounds like a problem possibly caused by adware on your pc.

1. please go to the firefox menu ≡ > addons > extensions & remove any suspicious entries (toolbars, things that you have not installed intentionally, don't know what purpose they serve, etc).
2. also go to the windows control panel / programs and remove all toolbars or potentially unwanted software from there.
3. finally, run a full scan of your system with different security tools like the free version of malwarebytes & adwcleaner, which are specialised in adware and browser hijackers.

Remove a toolbar that has taken over your Firefox search or home page Troubleshoot Firefox issues caused by malware

There are no suspicious entries. Already removed any software that might be causing issues. And I've run Malwarebytes and Hijackthis. No help. WHat else ya got?

please use adwcleaner as well...

OK, Adwcleaner loads a bunch of junk software that triggers my antivirus. Now, can you suggest something that will do the job without trying to add more crap to my system?

adwcleaner is a reputable tool and doesn't contain any crap - this is very likely a false positive on part of your security software!

Nope. It added 4 programs that I'm currently removing. Nowyouseeit, One System Care, KNCTR. I've gotten rid of the fourth one.

So, what other suggestions do you have?

are you sure you clicked on the right download link and not some google ad on that page?

Yep.

Now then, what else do you have?

OK, finally found a CLEAN download site for it.

And the problem remains.

Adwcleaner didn't work.

can you provide log files for the results of your last scans with malwarebytes & adwcleaner?

Reset/refreshed Firefox and it's gone. The problem was SEARCHINTERNET-A.AKAMAIHD.NET.