NoScript (Firefox)
The best security you can get in a web browser! Allow active content to run only from sites you trust, and protect yourself against XSS and Clickjacking attacks.
NoScript gives you with the best available protection on the web. It allows JavaScript, Java and other executable content to run only from trusted domains of your choice, e.g. your home-banking web site, guarding your "trust boundaries" against cross-site scripting attacks (XSS), cross-zone DNS rebinding / CSRF attacks (router hacking), and Clickjacking attempts, thanks to its unique ClearClick technology. It also implements the DoNotTrack tracking opt-out proposal by default.
The easy way to download and convert Web videos from hundreds of sites.
Blocks annoying video ads on YouTube, Facebook ads, banners and much more. Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).
AdBlock simply blocks ads on YouTube, Facebook and ads everywhere else on the web.
Enjoy a faster, safer and cleaner browsing experience.
LastPass, an award-winning password manager, saves your passwords and gives you secure access from every computer and mobile device.
I don't care about cookies for Opera removes annoying cookie warnings from almost all websites and saves you thousands of unnecessary clicks.
uBlock Origin is an efficient and powerful ad blocker with low memory and CPU usage, it is fully compatible with filter lists of Adblock Plus.