head to head · open source
uBlock vs UserAgent-Switcher
uBlock has 69,033 GitHub stars, 4,427 forks, 15 open issues and last shipped yesterday. UserAgent-Switcher has 1,543 stars, 200 forks, 150 open issues and last shipped 3 days ago. uBlock leads on adoption by 4,374% (69,033 vs 1,543 stars). uBlock is written in JavaScript under GPL-3.0; UserAgent-Switcher is written in JavaScript under MPL-2.0. uBlock has attracted 6% as many forks as stars, UserAgent-Switcher 13%. uBlock was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 3 topic tags (browser-extension, firefox, 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 | UserAgent-Switcher | |
|---|---|---|
| GitHub stars | ★ 69K | ★ 1.5K |
| License | GPL-3.0 | MPL-2.0 |
| Written in | JavaScript | JavaScript |
| Last push | 2026-11-02 | 2026-10-31 |
| Forks | ⑂ 4.4K | ⑂ 200 |
| 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 UserAgent-Switcher if
- You want the UserAgent-Switcher feature set and don't need the biggest community
- You prefer the MPL-2.0 license terms
- Your stack matches JavaScript
- You evaluated both and UserAgent-Switcher 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 UserAgent-Switcher
UserAgent Switcher A highly configurable browser extension for spoofing your User Agent string. UserAgent Switcher modifies both the User Agent in your browser's request headers and relevant JavaScript navigator properties (e.g., navigator.userAgent , navigator.appVersion , navigator.platform ). It also supports modern browser identification mechanisms such as Client Hints headers and the navigator.userAgentData object, ensuring consistent and comprehensive spoofing across all detection methods. Key Features Comprehensive Spoofing: Modifies both HTTP request headers and JavaScript navigator objects. Granular…
read the full UserAgent-Switcher overview →
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Frequently asked questions
Is uBlock or UserAgent-Switcher more popular?
uBlock has 69,033 GitHub stars and UserAgent-Switcher has 1,543. uBlock has the larger community by that measure.
Are uBlock and UserAgent-Switcher free?
Both are open source. uBlock is licensed under GPL-3.0 and UserAgent-Switcher under MPL-2.0. Neither carries a licence fee.
What is the difference between uBlock and UserAgent-Switcher?
uBlock is written in JavaScript and UserAgent-Switcher 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 UserAgent-Switcher?
Choose uBlock if you want the larger community (69,033 stars) or its GPL-3.0 licence terms. Choose UserAgent-Switcher if its feature set, stack or MPL-2.0 licence fits better. Both are self-hostable.