Mozilla, Threat model analysis
Mozilla did a Very Stupid Thing™ with Firefox. To promote Mr.Roboto, they made it look like there was a virus. Oh dear. A lot of oh dears. With that said, they were quick to bin it, although it does seem to set a bad precedent with browsers.
That being said, it might be the best option to stick with it, since Surf, another popular option,seems to be a bit of a pain in the arse when it comes to dependencies being out of date.