GreaseMonkey
I use Firefox as my browser of choice. It was an easy decision. Microsoft's Internet Explorer is not available for my operating system of choice. One nice feature of Firefox is being able to add applications and extensions into the browser environment so extra goodies are available.
I recently discovered one such extension
GreaseMonkey that alters the way HTML pages are rendered. One interesting example removes those irritating paid for adverts that Google displays. While that maybe useful my purpose in using GreaseMonkey is to improve the readability of web pages. If only people would realise that black text on black background is not a sensible combination. Even more conventional choices are not helpful for me; my dyslexia includes Meares-Irlen Syndrome. It helps to have text and backgrounds in different colours. Web designers don't understand that so I have to get out the GreaseMonkey and make sure that the colours and fonts are perfect. Some of the bloggers I read regularly don't understand either so GreaseMonkey lets me remove all the extraneous crud from those blogs.
Now if only there was a GreaseMonkey for PDF files I'd be happy.