Laptop volume: There are programs that will make laptop sound twice as loud, maybe more, without adding distortion. I googled Windows volume amplifier . There are a lot of programs and lists of "best" programs. . Two of the lists included
Blacken for Firefox. Lately, for some silly reason, some webpages use grey text instead of black and it's hard to read. Blacken doesn't change other colors, only grey which it makes black. It's only got 264 users, not millions like many add-ons, but it's free, pretty simple, I've had it for a month and it works fine afaict. Blacken, I think, once generated a warning that it was slowing down the browser or the computer, but my computer is pretty slow anyhow, so maybe yours will never say that.. The warning message gave the option to turn it off, and it puts an icon in the toolbar and I can always turn it on again when needed.