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Full Query
ID Priority Summary Status Whiteboard Assigned to
71895 -- Remove Hidden Window from Linux and Windows builds NEW pseudo-completed
1042363 P5 [meta] Reduce Fennec's APK size: building and packaging improvements NEW
1148979 P5 Move NewTabUtils into browser/, out of toolkit/ NEW
1391715 P3 Implement support for EmojiCompat on Android NEW

4 Total; 4 Open (100%); 0 Resolved (0%); 0 Verified (0%);


"Fatfennec" is the alias for an ongoing project to have Fennec use fewer bytes.

That means:

  • A smaller APK, which is faster to download, doesn't cause upgrade or install failures due to lack of storage (which helps our Growth and Ecosystem goals), and uses less space on disk.
  • Smaller runtime burden -- smaller and fewer databases, careful discarding of temporary files, etc.


Contributing factors:

  • Raw quantities of Java. We can reduce this via:
  • Raw quantities of JS. We can reduce this via:
    • Removing features that we don't use (e.g., Shumway).
    • Minifying: bug 1039902.
    • Not shipping JS source at all: bug 696095.
  • Assets. We ship:
    • > 7MB of fonts.
    • A few MB of images, some of which are at DPI levels that will never be used on a particular device.
    • More than 50 locales at 120KB each. Not all of these will be functional on every API version.


  • Reduce costs for each segment of users by building at least two different APKs. One targets API 9, one targets API 13+ (or 10+ if we want to continue to support Honeycomb). Each of these APKs only includes the relevant code (saving 35KB+ of compressed APK, and making the browser faster). The API 9 APK can exclude fonts, hdpi/xhdpi/xxhdpi/xxxhdpi images, tablet layouts, Android Beam code etc., and locales that don't function on API level 9.
  • Reduce costs for all users by attacking minification and other total-reduction items.


To follow.