# My Favorite Firefox Features

> Here are some of my favorite extensions and features in Firefox.

URL: [Original article](https://mattcool.tech/posts/my-favorite-firefox-features)

Published: 2025-07-08T11:47:00.000Z

Tags: notes

Long before I [started working with Mozilla](https://mattcool.tech/posts/looking-back-on-my-work-with-hubs), Firefox was my preferred browser for personal browsing. Why? A lot of it comes down to trust, transparency, and customizability.
I have a lot more faith in a nonprofit dedicated to internet health than enormous companies with profit-driven shareholders to please.

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Here are some of my favorite features and extensions I use daily.

### Tabs from other Devices

Your toddler runs into the room and turns off your PC with the push of a button and a mischievous giggle. No problem! All those tabs persist in a menu on one of your other devices and you can pull it up with a click!

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### Reading Mode

Instantly focus on the content. I love this for cutting out all the noise!

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### Multi-Containers

Get this extension here: https://addons.mozilla.org/en-US/firefox/addon/multi-account-containers/

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Huge efficiency gains for me since I started using multi-containers -
compartmentalizing my online life.

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You can open all your bookmarks from a folder in one shot in the correct
workspace. I use this every day with a work folder that has my work
calendar, docs, tools, and comms. Opens everything I need in a single window
with one click and I don't have to worry about being signed into any
personal accounts.

### Picture in Picture when tab switching

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Video content stays in view when switching tabs. I like it for podcasts and
news I have in the background.

Built in [pdf reader](https://support.mozilla.org/en-US/kb/view-pdf-files-firefox-or-choose-another-viewer#w_fill-out-forms-in-pdf-viewer)
is actually very good and is my default reader.

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Fill out forms, add a signature, highlight, text, images all directly in
Firefox.

### Copy Clean Link

Caption: Helps remove tracking from the link.

### Ublock Origin

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Excellent content blocker from developer Raymond Hill:
https://addons.mozilla.org/en-US/firefox/addon/ublock-origin/

blocks ads, trackers, coin miners, popups... its awesome. Just don't forget you may have to disable it on some sites you trust because they built popups or something into the basic functionality.

_Just my personal opinions and how I use Firefox daily_.
If you found any of these useful or if there are errors, let me know. Thanks!