HOW Browser Extensions Steal Your Data

Browser extensions can be a lot more dangerous than you realize. You probably don't understand the permissions that you're granting when installing a browser extension, so in this video we look at these permissions under a microscope, and explain what each one means. We also uncover the sketchy underground extension marketplace that no one talks about -- extensions that have lots of users are purchased and repurposed to collect data and do all kinds of nefarious things.

00:00 Intro
00:31 Overview
01:18 What is a Browser Extension?
04:09 Understanding Permissions
05:54 Background Service Workers
07:00 Pop-Ups
07:22 Content Scripts
07:54 Specific Permissions
16:17 Underground Extension Marketplaces
18:47 Should You Use Extensions At All?
21:08 Conclusion

Extensions are powerful tools that can be used for good and bad. Be careful which ones you let into your digital life.

Special Thanks to Matt Frisbie for sharing his expertise!
  / mattfriz  
Building Browser Extensions Book: https://amzn.to/43mg6YH

Brought to you by NBTV team members: Lee Rennie, Sam Ettaro, OGAR, Will Sandoval and Naomi Brockwell

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Here are a bunch of products I like and use. Using these links helps support the channel and future videos!

Recommended Books:

Beginner's Introduction To Privacy - Naomi Brockwell
https://amzn.to/3WDSfku

Permanent Record - Edward Snowden
https://amzn.to/305negc

What has the government done to our money - Rothbard
https://amzn.to/2KMzmcu

Extreme Privacy - Michael Bazzel (The best privacy book I've ever read)
https://amzn.to/3BLZ1gq
Digital version: https://inteltechniques.com/book7.html (non affiliate link)

No Place to Hide: Edward Snowden, the NSA, and the U.S. Surveillance State - Glenn Greenwald
https://amzn.to/2UQmJ4m

Some of my favorite products to help protect your privacy!

Brave browser: https://brave.com/nao076

Faraday bag (signal stopping, to protect your fob, credit card, computer, and phone)
https://amzn.to/3z02UiF

Data Blocker (if you're charging your phone in an unknown port, use this so that no data is transferred)
https://amzn.to/2SVh0J2

Camera tape (electrical tape is the best tape for covering phone and computer cameras)
https://amzn.to/3Xn8xBn

USB-C to ethernet adapter:
https://amzn.to/2lOVBoy

Privacy Screens (use your phone and computer in public? Keep your information safe!)

Computer: (Search for the size right for your computer)
MacBook Air 13" https://amzn.to/3VQvpZ7
HP/Dell/Acer/Asus/Lenovo 15.6" https://amzn.to/3KK1Oda
Lenovo Thinkpad/HP Elitebook/Dell 14" https://amzn.to/4enT2zq

Phone: (Search for the size for your phone, decide whether you want glass or plastic!)
Galaxy s24 - https://amzn.to/3VGgb8H
iPhone 15 - https://amzn.to/45vCd1h
Pixel 8 - https://amzn.to/3KFDuJF