Edit the contents of a web page prior to printing or saving. Elements in the web page can be edited, formatted, hidden or deleted. Unwanted content, such as adverts and sidebars, can easily be removed.
Enlarge thumbnails, and show images/videos from links with a mouse hover.
A beautiful New Tab page with many customisable backgrounds and widgets that does not require any permissions.
This is probably a laser cat add-on so you can shoot laser cat lasers at things.
Automatically learns to block invisible trackers.
Protects you against tracking through "free", centralized, content delivery. It prevents a lot of requests from reaching networks like Google Hosted Libraries, and serves local files to keep sites from breaking. Complements regular content blockers.
Firefox Multi-Account Containers lets you keep parts of your online life separated into color-coded tabs that preserve your privacy. Cookies are separated by container, allowing you to use the web with multiple identities or accounts simultaneously.
Finally, an efficient blocker. Easy on CPU and memory.
The easy way to download and convert Web videos from hundreds of YouTube-like sites.
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 other web security exploits. Disabled and can't reinstall? https://tinyurl.com/moz-ext-cert