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The Firefox Build System

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Testing & Test Infrastructure

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Releases & Updates

  • Mozilla Update Infrastructure
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Localization & Internationalization

  • Internationalization
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Firefox and Python

  • mozbase
  • Using third-party Python packages

Metrics Collected in Firefox

  • Metrics
Firefox Source Docs
  • How to
  • Report an issue / View page source

How to

Links for various HOW TO’s can be found here. These links describe in depth the HOW TO techniques.

  • CSS Flexbox Inspector: Examine Flexbox layouts

  • CSS Grid Inspector: Examine grid layouts

  • Debug scrollable overflow

  • Edit CSS filters

  • Edit Shape Paths in CSS

  • Edit fonts

  • Examine Event Listeners

  • Examine and edit CSS

  • Examine and edit HTML

  • Examine and edit the box model

  • Inspect and select colors

  • Open the Inspector

  • Reposition elements in the page

  • Select an element

  • Select and highlight elements

  • Use the Inspector from the Web Console

  • View background images

  • Visualize transforms

  • Work with animations


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