Firefox Extensions Worth 15 Minutes of Setup (That Most People Skip)

Most people get the same 5-10 Firefox extensions everyone gets. Here are the ones that are worth the 15 minutes of setup and configuration but that most people don't bother with.

1. Setting Up Keyword Bookmarks (5 minutes)

Keyword bookmarks turn the address bar into a personal search launcher. You're probably not using them.

Setup for common searches:

• Go to https://github.com/search?q=%s, bookmark it, add keyword gh
• Go to https://developer.mozilla.org/search?q=%s, add keyword mdn
• Go to https://www.npmjs.com/search?q=%s, add keyword npm
• Go to https://caniuse.com/search?search=%s, add keyword cani

Now typing gh firefox extension in the address bar searches GitHub directly. Typing mdn flexbox opens the MDN search. No extensions required.

2. Configuring Multi-Account Containers with Site Assignments (15 minutes)

Installing Multi-Account Containers takes 30 seconds. Getting the value out of it requires 15 minutes of setup:

1. Create your containers (Personal, Work, Finance, Shopping)
2. For each container, right-click a link to a key site → "Always Open in [Container]"
3. Visit each assigned site to set up the login

After this setup, every time you click a link to Gmail, it automatically opens in the right container. Your banking site opens in Finance. You never have to think about it.

The 15 minutes of setup removes a recurring daily friction point.

3. Configuring ETP Strict Mode (2 minutes)

The default Enhanced Tracking Protection blocks tracking scripts. Strict mode blocks significantly more.

Settings → Privacy & Security → Enhanced Tracking Protection → Strict.

The risk: some sites use cross-site tracking for legitimate SSO logins. If a site breaks, add an exception. I've had to add exceptions for about 5 sites over 2 years.

The benefit: substantially fewer trackers loading on every page.

4. Setting Up Tree Style Tab (20 minutes)

Tree Style Tab is one of the most powerful tab management approaches in any browser.

The setup requires hiding Firefox's built-in horizontal tab bar via a userChrome.css file — Firefox doesn't let you hide it via settings. This takes about 20 minutes following the documentation on the extension's website.

After setup: tabs appear as a vertical tree in the sidebar. Child tabs (opened from links in the parent) are nested under the parent. You can collapse subtrees.

If you have more than 10 tabs open at any given time, this is worth the setup effort.

5. Configuring uBlock Origin's Advanced Features (10 minutes)

Most people install uBlock Origin and never configure it further. The advanced features are worth setting up:

Enable "I am an advanced user": In uBlock Origin settings → Settings tab → check "I am an advanced user."

This gives you per-site and per-resource blocking controls directly in the popup. You can see exactly what's being blocked on any page and make exceptions or additional blocks with single clicks.

Enable "Block remote fonts": Stops sites from loading font files from third-party CDNs. Slightly faster page loads and fewer fingerprinting vectors.

Import a supplementary filter list: The default filter lists are comprehensive. Adding the "Annoyances" filters additionally blocks cookie notices, newsletter popups, and other UX friction.

6. Weather & Clock Dashboard: Configure World Clocks (5 minutes)

If you install Weather & Clock Dashboard, the default shows local weather. The 5-minute setup:

1. Open the extension settings
2. Add the cities where your colleagues, clients, or family are
3. Optionally switch to dark mode if you prefer it

After this: every new tab shows you both the weather and the current time for your people. The ambient awareness of what time it is for colleagues — especially for remote workers — reduces the mental math involved in scheduling and communication timing.