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Best Firefox Developer Tools Alternatives in 2026

Updated

20 tools from web browsers ranked against Firefox Developer Tools on the same published basis.

  1. 1
    Brave Browser Free plan Open sourceAndroidiOSLinuxMacWin $2.50/mo9.5
    Firefox Developer Tools vs Brave Browser
  2. 2
    Opera Free plan AndroidextensioniOSLinuxMac $0.33/mo9.5
    Firefox Developer Tools vs Opera
  3. 3
    Microsoft Edge Free plan AndroidextensioniOSLinuxMac Free9.3
    Firefox Developer Tools vs Microsoft Edge
  4. 4
    Google Chrome Free plan AndroidextensioniOSLinuxMac Free9.2
    Firefox Developer Tools vs Google Chrome
  5. 5
    Mozilla Firefox Free plan Open sourceAndroidextensioniOSLinuxMac Free9.1
    Firefox Developer Tools vs Mozilla Firefox
  6. 6
    Waterfox Free plan Open sourceAndroidextensionLinuxMacWin $5/mo9.1
    Firefox Developer Tools vs Waterfox
  7. 7
    DuckDuckGo Browser Free plan AndroidiOSMacWin $8.33/mo8.9
    Firefox Developer Tools vs DuckDuckGo Browser
  8. 8
    JioSphere Free plan AndroidiOSLinuxMacWeb Free8.9
    Firefox Developer Tools vs JioSphere
  9. 9
    Vivaldi Free plan AndroidextensioniOSLinuxMac Free8.8
    Firefox Developer Tools vs Vivaldi
  10. 10
    Maxthon Free plan AndroidextensioniOSMacWeb Free8.8
    Firefox Developer Tools vs Maxthon
  11. 11
    360 Secure Browser Free trial AndroidiOSLinuxMacWin CNY 4.83/mo8.8
    Firefox Developer Tools vs 360 Secure Browser
  12. 12
    Comet Free plan AndroidiOSMacWin Free8.7
    Firefox Developer Tools vs Comet
  13. 13
    Kameleo Free plan AndroidapiextensioniOSLinux €3.75/mo8.7
    Firefox Developer Tools vs Kameleo
  14. 14
    Ecosia Browser Free plan AndroidiOSLinuxMacWin Free8.6
    Firefox Developer Tools vs Ecosia Browser
  15. 15
    NAVER Whale Free plan AndroidextensioniOSLinuxMac Free8.6
    Firefox Developer Tools vs NAVER Whale
  16. 16
    Tor Browser Free plan Open sourceAndroidLinuxMacWin Free8.5
    Firefox Developer Tools vs Tor Browser
  17. 17
    Mullvad Browser Free plan Open sourceLinuxMacWin Free8.5
    Firefox Developer Tools vs Mullvad Browser
  18. 18
    Safari Free plan extensioniOSMac Free8.4
    Firefox Developer Tools vs Safari
  19. 19
    Dia Free plan Mac $20/mo8.4
    Firefox Developer Tools vs Dia
  20. 20
    Aloha Browser Free plan Open sourceWinMacLinuxiOSAndroid Free8.4
    Firefox Developer Tools vs Aloha Browser

Firefox Developer Tools alternatives compared

#ToolScoreFree planFromRuns on
1Brave Browser9.5Free plan$2.50/moAndroid, iOS, Linux, Mac, Windows
2Opera9.5Free plan$0.33/moAndroid, Browser, iOS, Linux, Mac, Web, Windows
3Microsoft Edge9.3Free planFreeAndroid, Browser, iOS, Linux, Mac, Web, Windows
4Google Chrome9.2Free planFreeAndroid, Browser, iOS, Linux, Mac, Web, Windows
5Mozilla Firefox9.1Free planFreeAndroid, Browser, iOS, Linux, Mac, Web, Windows
6Waterfox9.1Free plan$5/moAndroid, Browser, Linux, Mac, Windows
7DuckDuckGo Browser8.9Free plan$8.33/moAndroid, iOS, Mac, Windows
8JioSphere8.9Free planFreeAndroid, iOS, Linux, Mac, Web, Windows
9Vivaldi8.8Free planFreeAndroid, Browser, iOS, Linux, Mac, Windows
10Maxthon8.8Free planFreeAndroid, Browser, iOS, Mac, Web, Windows
11360 Secure Browser8.8NoCNY 4.83/moAndroid, iOS, Linux, Mac, Windows
12Comet8.7Free planFreeAndroid, iOS, Mac, Windows
13Kameleo8.7Free plan€3.75/moAndroid, API, Browser, iOS, Linux, Mac, Web, Windows
14Ecosia Browser8.6Free planFreeAndroid, iOS, Linux, Mac, Windows
15NAVER Whale8.6Free planFreeAndroid, Browser, iOS, Linux, Mac, Windows
16Tor Browser8.5Free planFreeAndroid, Linux, Mac, Windows
17Mullvad Browser8.5Free planFreeLinux, Mac, Windows
18Safari8.4Free planFreeBrowser, iOS, Mac
19Dia8.4Free plan$20/moMac
20Aloha Browser8.4Free planFreeWindows, Mac, Linux, iOS, Android
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Questions about Firefox Developer Tools alternatives

What is the best alternative to Firefox Developer Tools?

Brave Browser, number 1 in web browsers with a score of 9.5 out of 10. The others here: Opera, Microsoft Edge, Google Chrome and 16 more.

What is the best free alternative to Firefox Developer Tools?

Brave Browser is the best-ranked alternative with a free plan. 19 of the 20 alternatives here publish a free plan on their own pricing pages.

Is there an open-source alternative to Firefox Developer Tools?

Yes: Brave Browser, Mozilla Firefox, Waterfox and 3 more.

How are these alternatives ranked?

Ranked on what each maker publishes, the fullest spec sheet first: how deeply the product is documented, the platforms it runs on, a free tier or trial to test it, and its standing.