head to head · open source
quasar vs UserAgent-Switcher
quasar has 27,211 GitHub stars, 3,672 forks, 74 open issues and last shipped 3 days ago. UserAgent-Switcher has 1,516 stars, 189 forks, 150 open issues and last shipped 19 days ago. quasar leads on adoption by 1,695% (27,211 vs 1,516 stars). quasar is written in JavaScript under MIT; UserAgent-Switcher is written in JavaScript under MPL-2.0. quasar has attracted 13% as many forks as stars, UserAgent-Switcher 12%. quasar 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
| quasar | UserAgent-Switcher | |
|---|---|---|
| GitHub stars | ★ 27K | ★ 1.5K |
| License | MIT | MPL-2.0 |
| Written in | JavaScript | JavaScript |
| Last push | 2026-09-17 | 2026-09-01 |
| Forks | ⑂ 3.7K | ⑂ 189 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick quasar if
- You weight community size — 27K stars and counting
- You want the MIT 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 quasar
Quasar Framework is an MIT licensed Vue.js framework that builds responsive single page apps, server side rendered and statically generated sites, progressive web apps, browser extensions, hybrid mobile apps, and Electron desktop apps from a single codebase.
read the full quasar overview →
About UserAgent-Switcher
UserAgent Switcher is a highly configurable, MPL 2.0 licensed browser extension for Chrome, Firefox, Edge, and Opera that spoofs the User Agent string in HTTP request headers and in the JavaScript navigator objects that pages read, so anyone testing, researching, or deliberately reshaping their browser identity gets one consistent identity across every detection path.
read the full UserAgent-Switcher overview →
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Frequently asked questions
Is quasar or UserAgent-Switcher more popular?
quasar has 27,211 GitHub stars and UserAgent-Switcher has 1,516. quasar has the larger community by that measure.
Are quasar and UserAgent-Switcher free?
Both are open source. quasar is licensed under MIT and UserAgent-Switcher under MPL-2.0. Neither carries a licence fee.
What is the difference between quasar and UserAgent-Switcher?
quasar 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, quasar or UserAgent-Switcher?
Choose quasar if you want the larger community (27,211 stars) or its MIT licence terms. Choose UserAgent-Switcher if its feature set, stack or MPL-2.0 licence fits better. Both are self-hostable.