Browser extension

Browsers extensions are plug-ins that extend the normal functionality of a web browser. Browser extensions can change the user interface of the web browser without directly affecting viewable content of the page. Browser extensions are excellent tools to help you prevent your data from being tracked and remaining private online.

Examples

 * Ghostery
 * Adblock Plus

Resources
[1] Browser Extension. Retrieved March 30, 2017, from https://en.wikipedia.org/wiki/Browser_extension