Firefox

Here we go again. Misinformation run amuck. All browsers have security issues. Every FF release has security fixes. Chrome has a new one where someone can get all your passwords if they have access to your computer even if you have a master password. This includes remote access. IE has security fixes also although I have never heard of hourly ones. Was that an exaggeration?
Speed? you get microseconds faster if you use (plug your browser in here). WOW
Myself I use FF because I like the many add ons that are available. I do use Chrome on my tablet but not on the computer.