4 Must-Have Security AddOns for Browser

[amazinghorse]

Adblock Plus blocks annoying ads on the web. It can block other things, like tracking, as well. With more than 50 million users, it is the world's most popular browser extension. Adblock Plus is an open source project created by Wladimir Palant in 2006. Eyeo was founded in 2011 by Wladimir Palant and Till Faida to make its development sustainable.
Adblock Plus itself has no functionality, in the sense that it does not block anything until it is "told" what to do by its filter lists. These filter lists are essentially an extensive set of rules, which tell Adblock Plus which elements of websites to block. Besides blocking advertisements, filter lists can also be used to block tracking and malware.
 

NoScript Firefox extension provides extra protection for Firefox, Seamonkey and other mozilla-based browsers: this free, open source add-on allows JavaScript, Java, Flash and other plugins to be executed only by trusted web sites of your choice (e.g. your online bank).
NoScript also provides the most powerful anti-XSS and anti-Clickjacking protection ever available in a browser.
NoScript's unique whitelist based pre-emptive script blocking approach prevents exploitation of security vulnerabilities (known and even not known yet!) with no loss of functionality...
You can enable JavaScript, Java and plugin execution for sites you trust with a simple left-click on the NoScript status bar icon (look at the picture), or using the contextual menu, for easier operation in popup statusbar-less windows.
 

Ghostery is a browser tool available for Firefox, Chrome, Safari, Opera, Internet Explorer, as well as a standalone app available for iOS. It scans the page for trackers - scripts, pixels, and other elements - and notifies you of the companies whose code is present on the webpage you are visiting. Usually, these trackers aren’t visible, and they are often hard to find in the page source code. Ghostery allows you to learn more about these companies and their practices, and block the page elements from loading if the user chooses.
 

HTTPS Everywhere is produced as a collaboration between The Tor Project and the Electronic Frontier Foundation. Many sites on the web offer some limited support for encryption over HTTPS, but make it difficult to use. For instance, they may default to unencrypted HTTP, or fill encrypted pages with links that go back to the unencrypted site. The HTTPS Everywhere extension fixes these problems by using a clever technology to rewrite requests to these sites to HTTPS.