Is it me of does Firefox no longer bother?

Since today (and most likely also a few days back) Firefox simply stops responding at random times or sometimes all the time when I browse some websites, to the point that all I do is open a new tab and the who program decides to freeze, prompting me to click in frustration causing it to grey out. And it's becoming a major inconvenience.

I'm getting tired of it out of sheer honesty. I switched to Firefox and swore by it a few years back and stuck with it when Internet Explorer stopped responding all the time. And now Firefox is doing the same thing. It's the latest version, so why is it suddenly so buggy? Nothing else on my computer is misbehaving like this.