Firefox

Firefox is a free and open-source web
browser.

List of useful Firefox addons

Following is a list of useful Firefox addons.
They can be removed and configured under about:config.

Useful configuration

To disable the telemetry of firefox navigate to about:telemetry and (if it says
enabled) click on enabled and disable all the options.

To disable ads from firefox navigate to about:config, search for
browser.newtabpage.activity-stream.showSponsored and disable all upcoming results.

On Linux distributions auto scroll is disabled by default.
This means that you cant click the middle mouse button to use it for scrolling.
To enable it go into the preferences and check Use autoscrolling.

Add a new search engine

You can add a new search engine with the addon Add custom search engine.
Make sure to replace <url to search engine> with the according url.

It is possible to add it without an addon.
Navigate to the search engine and click the ... in the address bar.
Then click Add Search Engine