I need two extensions for Chrome and Firefox browsers to perform multiple actions on a website. (www.tuenti.com)
1º) The extension may allow the user to change the color (6 basic colors) on the top bar of the website
2º) The extension may allow the user to change the background of the web (the current background color is gray). The image must be stored on their computer
3º) The extension allows me to insert an advertisement that I want (in html) on the sides of the web (2 left and 2 right).
4º) A counter of the number of users who are using instant extensionen.
The number 1 and 2 managed from the user view
The number 3 and 4 managed from a simple web