I can't think of one bad thing to say about Firefox, I really can't. I've been using it for ages now as my main browser and only use IE when I 'really' need to. I simply cannot fault it.
But... I have noticed more and more places are finding ways of getting round the pop-up blocker and the ad-blockers, etc... and other built in security which is a concern.
Today, for example, a 'friend' was visiting one of those w@rez site thingies (whatever they are

) and not only did the site have a virus embedded in it, but it had a pop-up for an auto-dialler which it tried to install
even after cancelling it, and it managed to open 2 other pages behind the main page. The sort of stuff FF is renowned for stopping.
Now, be assured my 'friend' is a very security conscious individual with all the usual stuff installed and fully updated. Kaspersky caught and dealt with the virus, (not much FF can do there), but I have to say that I, err...
he was just a wee tad shocked and surprised to see this with FF. It's the worst instance of anything like this I have seen since starting to use the browser.
I suppose the price of increased popularity is that it will be more of a target and the bad guys Firefox has been stopping up till now are working just that wee bit harder to get round it.
As stated previously, I reckon FF is great, but it's not the 100% secure solution everyone is touting it to be.
Not a rant, not a complaint (unusual for me, I know), just a wee pause for thought guys.
~Bear