Alternatives to Firefox Developer Tools

The web developer tools built into Firefox for inspecting, editing and debugging HTML, CSS and JavaScript. The listings below can replace it for an important use case. Each note says what changes if you switch.

Replacements

Listings that take over the same core job as Firefox Developer Tools.

  • Chrome DevTools

    The web developer tools built into Google Chrome for editing pages, debugging and profiling performance.

    FreeOpen sourceWindowsmacOSLinux

    Chrome DevTools switches testing to the Chromium engine and adds an MCP server for coding agents, with AI features that rely on Google's Gemini service.

  • Firefox Developer Edition

    A pre-release build of Firefox for web developers, with the newest developer tools and platform features.

    FreeOpen sourceWindowsmacOSLinux

    Firefox Developer Edition is a pre-release Firefox build that gets the newest developer tools earlier, at the cost of being potentially less stable than the regular release.

  • Eruda

    Developer console that runs inside a mobile browser page.

    FreeOpen sourceWeb

    Eruda runs as a console inside the page on a mobile browser, added by script tag with no installation, but it is less capable than full browser tools.

Also worth comparing

These listings name Firefox Developer Tools as their own alternative, so the relationship runs both ways.

  • JSON Viewer

    Formats and highlights JSON responses in the browser.

    FreeOpen sourceBrowser extension

    Firefox Developer Tools include a built-in JSON viewer in Firefox with nothing to install, while JSON Viewer serves Chromium browsers only.

  • VisBug

    Point-and-click editing tools for any live web page.

    FreeOpen sourceWebBrowser extension

    Firefox Developer Tools is built into Firefox for editing HTML, CSS and JavaScript, but works only inside Firefox and uses panels instead of on-page point-and-click tools.

  • Web Developer

    Toolbar of web development tools for inspecting and manipulating a page.

    FreeOpen sourceBrowser extension

    Firefox Developer Tools is built into Firefox and can debug Firefox for Android remotely, but it only works inside Firefox rather than across Chrome, Firefox and Edge.

Similar software

Related functionality, not a direct replacement.