Mozilla Firefox

About Mozilla Firefox

Mozilla Firefox (or simply Firefox) is a free and open-source web browser developed by Mozilla Foundation and its subsidiary, Mozilla Corporation.
Firefox is available for Windows, macOS, Linux, and BSD operating systems.
Its sibling, Firefox for Android, is available for Android.

Firefox uses the Gecko layout engine to render web pages, which implements current and anticipated web standards.

In 2016, Firefox began incorporating new technology under the code name Quantum to promote parallelism and a more intuitive user interface.
An additional version, Firefox for iOS, was released in late 2015; due to platform restrictions, it uses the WebKit layout engine instead of Gecko, as with all other iOS web browsers.

Recommended add-ons

uBlock Origin
User-Agent Switcher (user agent can also be edited with the general.useragent.override string in about:config)
Cookie AutoDelete
YouTube Plus
HTTPS Everywhere
Firefox Multi-Account Containers
Project Insight

Be careful when installing browser add-ons/extensions!

The add-ons listed here are add-ons that I use personally, so I’ll check if they’re safe to use or not.

Disabling telemetry and data collection by Mozilla

By default, the telemetry level in Firefox is pretty high. With the right settings, you can minimize the telemetry and data collection done by Mozilla when using Firefox.
You can disable most of the telemetry/data collection options using:
– The Firefox preferences pages
– The about:config page

Unchecking these options in the Firefox preferences will disable some of the telemetry within Firefox.

Useful about:config tweaks

Firefox offers a page, about:config, which offers a lot of options to further customize how Firefox works.
Some recommended tweaks and their functionality will be listed here.
About about:config:
about:config settings I can recommend:
– pdfjs.disabled = true (default=false) – This disables the JavaScript PDF viewer in Firefox, PDF files will now be downloaded instead of being showed in the browser.
– geo.enaled = false – This disabled usage of your geographical location.
– More to come… , make sure to check the links above for useful tweaks.

Checking addon permissions with Project Insight

“Project Insight, is a browser add-on that shows you what permissions your installed add-ons have and what domains they have permission to access. This allows you to evaluate which add-ons have the potential to invade your privacy.”

gHacks article:
Get the addon: