I don't know which update did it... but I noticed today for the first time that Firefox "find" function (CMD + F on the mac) is no longer case sensitive!
Lord Jesus, Hallelujah! I can't tell you how many times I was looking for some text on a big page and was stymied because the word started a sentence, or was in all caps, and the silly case-sensitive search function wouldn't pick it up. I almost (ALMOST) switched to Chrome just because of this craziness. But now I don't have to.
To whomever fixed this in whatever update, bravo, sir, bravo. Or madam. Bravo, whoever you are!