Your browser opens dozens of times per day. Each time, you see the new tab page for a split second — maybe less. That's hundreds of micro-moments that currently show you... nothing useful.
Here's a comparison of the top Firefox new tab extensions, from a developer who builds them.
What Makes a New Tab Extension Good?
Before comparing, let's define the criteria:
- Information density — does it show me something useful?
- Load time — does it slow down new tab opens?
- Privacy — does it track me?
- Customization — can I make it mine?
- Free tier — is the useful version free?
The Contenders
1. Momentum Dash
Verdict: Beautiful but limited (free tier)
Momentum shows a beautiful photo, the time, and a daily focus prompt. Premium unlocks weather, todos, and more widgets. The free tier is minimal — just time and a pretty background.
- Load time: Fast
- Privacy: Account required (tracks usage)
- Free tier: Very limited
- Customization: Moderate (premium)
2. New Tab Override
Verdict: Developer-focused, total control
New Tab Override lets you set any URL as your new tab page. It's pure configuration — no widgets, no weather, just "open this URL when I press Ctrl+T."
- Load time: Depends on the target URL
- Privacy: Excellent (no data collection)
- Free tier: Full feature (open source)
- Customization: Unlimited (you control the URL)
3. Tabliss
Verdict: Most customizable
Tabliss is a widget-based new tab with backgrounds, weather, clock, to-do lists, and more. Each widget is modular and configurable.
- Load time: Moderate (many active widgets can slow it)
- Privacy: Good (self-contained)
- Free tier: Full feature
- Customization: Excellent
4. iTab New Tab
Verdict: Feature-rich but heavy
iTab packs in a lot: bookmarks, apps, wallpapers, weather, search. It's essentially a mini dashboard.
- Load time: Slower (many features)
- Privacy: Mixed (some features call external servers)
- Free tier: Full feature
- Customization: High
5. Weather & Clock Dashboard
Verdict: Focused on the essentials
This is the extension I built (install here). I built it because I wanted exactly three things on my new tab: weather, clocks, search. Nothing else.
- Load time: Instant (pure HTML/CSS/JS, no frameworks)
- Privacy: No data collection, no account, no external analytics
- Free tier: 100% free, MIT open source
- Customization: Weather city, multiple timezone clocks, theme toggle
The Performance Test
I benchmarked new tab load times on the same machine:
New Tab Override (blank): ~10ms
Weather & Clock Dashboard: ~150ms
Tableau (3 widgets): ~400ms
iTab (default config): ~800ms
Momentum (premium): ~250ms
Note: External API calls (weather data) are loaded asynchronously and don't block the visual render.
Which One Should You Use?
Choose Momentum if: You want beautiful backgrounds and don't mind a paid subscription for full features.
Choose New Tab Override if: You have a specific webpage you want to open (your company dashboard, Notion, etc.).
Choose Tabliss if: You want maximum widget customization and are willing to configure each one.
Choose iTab if: You want a full browser home page with bookmarks and apps.
Choose Weather & Clock Dashboard if: You want live weather + world clocks without any account, subscription, or data collection. Just install and use.
The Open Source Angle
One thing worth noting: Weather & Clock Dashboard and New Tab Override are both MIT-licensed open source projects. You can inspect the code, fork it, or contribute. For a piece of software that loads on literally every new browser tab, knowing exactly what it does matters.
For closed-source new tab extensions, you're trusting that they aren't injecting ads, tracking your browsing habits, or monetizing your data in ways not disclosed in privacy policies that nobody reads.
Conclusion
The "best" new tab extension depends entirely on what you want your new tab to do. If the answer is "show me weather + current time in multiple cities + let me search quickly," then I'm biased but I'd recommend Weather & Clock Dashboard.
If you want complete flexibility, New Tab Override combined with a locally-hosted page is unbeatable. If you want maximum widgets, Tabliss has the most.
The one I'd avoid: any extension with a required account on the free tier. Your new tab page shouldn't phone home every time you open a tab.
I build Weather & Clock Dashboard. All benchmarks were performed on my own machine; YMMV.