head to head · open source
uBlock vs MarvellousSuspender
uBlock has 69,033 GitHub stars, 4,427 forks, 15 open issues and last shipped yesterday. MarvellousSuspender has 1,407 stars, 148 forks, 53 open issues and last shipped 5 days ago. uBlock leads on adoption by 4,806% (69,033 vs 1,407 stars). uBlock is written in JavaScript under GPL-3.0; MarvellousSuspender is written in JavaScript under GPL-2.0. uBlock has attracted 6% as many forks as stars, MarvellousSuspender 11%. uBlock was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (browser-extension, javascript), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| uBlock | MarvellousSuspender | |
|---|---|---|
| GitHub stars | ★ 69K | ★ 1.4K |
| License | GPL-3.0 | GPL-2.0 |
| Written in | JavaScript | JavaScript |
| Last push | 2026-11-02 | 2026-10-29 |
| Forks | ⑂ 4.4K | ⑂ 148 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick uBlock if
- You weight community size — 69K stars and counting
- You want the GPL-3.0 license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick MarvellousSuspender if
- You want the MarvellousSuspender feature set and don't need the biggest community
- You prefer the GPL-2.0 license terms
- Your stack matches JavaScript
- You evaluated both and MarvellousSuspender fits your workflow better
About uBlock
[![Badge Commits]][Commit Rate] [![Badge Issues]][Issues] [![Badge Localization]][Crowdin] [![Badge License]][License] [![Badge NPM]][NPM] [![Badge Mozilla]][Mozilla] ![Badge Chrome] [![Badge Edge]][Edge] uBlock Origin (uBO) GitHub Releases Stable and development versions on Firefox, Chromium MV2, and Thunderbird. Must be placed manually into web browsers; the Chromium and Thunderbird versions usually won't auto update. Related: uBlock Origin Lite uBlock Origin (uBO) is a CPU and memory efficient [wide spectrum content blocker][Blocking] for Chromium and Firefox. It blocks ads, trackers, coin miners, popups…
read the full uBlock overview →
About MarvellousSuspender
The Marvellous Suspender Free your memory. Suspend what you don't need. A free, open source Chrome extension no ads, no tracking. Based on The Great Suspender, cleaned up and actively maintained. Once installed and enabled, this extension will automatically suspend tabs that have not been used for a default, or user configurable, time interval. As a result, resources such as memory and CPU that the tab was consuming are freed. If you have suggestions or problems using the extension, please submit a bug or a feature request. Chrome Web Store The Marvellous Suspender is available via the official Chrome Web Store…
read the full MarvellousSuspender overview →
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Frequently asked questions
Is uBlock or MarvellousSuspender more popular?
uBlock has 69,033 GitHub stars and MarvellousSuspender has 1,407. uBlock has the larger community by that measure.
Are uBlock and MarvellousSuspender free?
Both are open source. uBlock is licensed under GPL-3.0 and MarvellousSuspender under GPL-2.0. Neither carries a licence fee.
What is the difference between uBlock and MarvellousSuspender?
uBlock is written in JavaScript and MarvellousSuspender in JavaScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, uBlock or MarvellousSuspender?
Choose uBlock if you want the larger community (69,033 stars) or its GPL-3.0 licence terms. Choose MarvellousSuspender if its feature set, stack or GPL-2.0 licence fits better. Both are self-hostable.