Take Control of Your Cookies: Cookie AutoDelete
Good allowed and deny list options.
Deleting cookies from containers may be confusing.
Cookie AutoDelete also supports container tabs in Firefox 53 and up.

Sometimes redirects to archived over live version.
Grab Online Videos for Offline Viewing: Video DownloadHelper
Straightforward user interface and functionality.
Multiple video formats offered.

Sometimes doesn’t recognize HD availability.
More software may be required for all features.
Block Invisible Web Trackers: Privacy Badger
Blocks trackers without breaking most sites.

The extension learns when to block intrusive trackers.
Not all types of trackers get blocked.
The extension requires a bit of initial configuration.

Privacy Badger blocks online trackers intuitively by learning which sites are tracking you while you browse.
More Power Over Your Web History: History AutoDelete
Reliably auto-deletes your browsing history.
Scrolling performance can be affected.

History AutoDelete gives you the ability to delete your Firefox browsing history for specific domains automatically.
it’s possible for you to also remove older browsing entries by a specified number of days.
On The Fly Script Blocking: uMatrix
A useful tool for full privacy control.

You get to choose which scripts run.
More for intermediate to advanced users.
Ad Tracking Protection: AdNauseam
Protects your data against online ad tracking.

View each ad collected in the extensions AdVault.
The lack of dynamic filtering.
AdNauseam is an extension built to protect your information against advertising tracking, as well as hidden malware.

Take, Edit, and Upload Screenshots: Lightshot
Reliable online storage.
Good variety of editing tools.
Grabbing entire screen sometimes takes adjusting.

The Lightshot web extension for Firefox takes and edits screenshots, right from the web client.
Screen captures are saved locally or to Lightshot’s free cloud storage.
View Your Tabs in a Text File: Export Tabs URLs
Easy enough for anyone to use.

Lists are limited to the current browsing window.
View, export, or copy the URLs of all your open web client tabs.
you could include the page title along with the domain, and the exported file comes with a timestamp.

Some online window icons can be difficult to see.
You canadjust the brightness, contrast, and font, as well as use an ignore list.
Grab Website Content Based on Patterns: Download Star
Scrapes web contents thoroughly.

The user interface can be a little confusing at first.
Download Star makes downloading items from a website a breeze.
you could edit the add-on’s filters to specify certain types of matching files.

A few compatibility issues with older Firefox versions.
The View Image web extension brings back both theView ImageandSearch by Imagebuttons inGoogle Imagessearch results.
When the buttons got removed, many users were left frustrated.

The View Image addon restores the older functionality many are more comfortable with.
Enhance Your YouTube Experience: Iridium
Stop channels from displaying in suggestions.
The option to disable 60 fps/frames per second.

Videos freeze on rare occasions.
Iridium lets you customize your YouTube viewing experience with a wide variety of extra features.
Keep Your Online Life Separated: Firefox Multi-Account Containers
Streamlines browsing.

Functionality can be limited in private mode.
Multi-Account Containers keeps your online identities separate from one another.
you could stay signed into multiple accounts at the same time, and your cookies get compartmentalized by containers.

Only Send Referers When on the Same Domain: Smart Referer
Handy configuration options.
Can be confusing when the extension icon is greyed out.
Smart Referer works by only sending referrer headers while remaining on the same domain.

you might edit filters and create a safe list of domains that will send referrers as usual.
Get That Tab Back With One Click: Undo Close Tab
Easy to use.
Blends nicely with other add-on icons and toolbars.

The dark icon can be tough to see with dark web app themes.
Undo Close Tab is a simple yet effective extension that will bring back any tabs you accidentally close.
Look up Images Right From Firefox: Reverse Image Search
Multiple image searching options.

Returns search results quickly.
Some compatibility issues on mobile versions of Firefox.
Control the Scrollbar With Your Middle Mouse Button: ScrollAnywhere
Makes scrolling long form pages a breeze.
The momentum feature is fun.
Doesn’t work on configuration pages (about:config).
Will not function in PDF view.
The ScrollAnywhere web extension gives you a lot more control over your scrolling.
Manipulate the scrollbar with your middle mouse button without actually using the net net app’s scrollbar.
There’s an option to enable infinite scrolling, as well as the ability to change the cursor mid-scroll.
Run JS When You Want: Disable JavaScript
Simple and easy to follow options.
Knowing which JS to avoid/allow can be confusing.
The Disable JavaScript extension gives you the option ofdisabling JavaScriptfor specified tabs or sites.
Stop Facebook From Tracking Your Web Habits: Facebook Container
Seamless and smooth integration.
Causes issues when using FB for other accounts.
It’s pretty obvious Facebook tracks their users' browsing patterns when signed in.
Facebook Container segregates your web activity from your Facebook account and eliminates any tracking.