Develop a Chrome, Firefox, and IE addon that Inserts a Simple Button into a few web pages

Develop Firefox addon that Inserts a Simple Button into the web pages listed types of Web pages. 1. Create a Mozilla add-on that Inserts a graphical 3 state clickable button into each of 6 different types of pages: Google Search Results Facebook Bing Search Results [login to view URL] [login to view URL] Yahoo Search Results 2. A Check to see if the Targeted aspects of the page layout has changed. So, if Google search results got a makeover and looked entirely different, the add-on can identify that a change has been made. Specifically with relation to the search buttons and the placement of the add-on button. If the Check fails: that portion of the button insertion is disabled. This add-on will need to be made as a component to be added to other add-ons in Firefox