Most of the website contains lots of unnecessary data i.e ads, images, different fonts etc. These things are not suitable for better reading. If you want to remove unnecessary things on a webpage Tranquility is a free Firefox add on that will help you to remove unnecessary data. You can simple add Tranquility on your browser.
Tranquility makes clean unnecessary details on website and provides better reading. To remove details click the icon in the status bar or use the keyboard shortcut CTRL+ALT+T. You can disable the background image also.
Download Tranquility click here