Possible virus?(Firefox) - eviltoast

I opened firefox After about an hour of the system being in standby and in theSponsored Links row there were 2 new entries

http:/ /bom07s30-in-x03. 1e100. net/ (I dismantled the URLs to prevent accidental clicks)

pnbomb-ac-in-x0e.1e100

I right clicked and searched in Google and it showed up as this

pnbomb-ac-in-x0e.1e100 Sponsored it disappeared after a while, just to be sure I ran sudo lsof -i and noticed firefox was connected to this url

maa05s15-in-x03.1e100.net

I am not sure if am infected or this is just a glitch(I obviously didn’t click on the links)