This should enable HiDPI rendering on retina macbooks, except when a non-HiDPI display is also attached (see bug 794038 for multi-/mixed-resolution issues).
Note that until bug 785667 lands, HiDPI users will experience some issues with plugins: in some cases, plugin content will be incorrectly scaled, and/or interaction with controls will be broken.
If you need to work around this until plugin support lands, go to about:config and set "gfx.hidpi.enabled" to 0 (and restart the browser) to revert to non-HiDPI rendering.
Unless this needs to be backed out for unexpected failures, please file new bugs for any remaining glitches in HiDPI rendering, rather than adding to this bug, and mark them as blocking the HiDPI tracker (bug 785330).
Here's the message from the bug of importance:
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Jonathan Kew (:jfkthame) 2012-09-29 05:32:37 PDT
Pushed to inbound (parts 1-6):
https://hg.mozilla.org/integration/mozilla-inbound/rev/66bc6...
https://hg.mozilla.org/integration/mozilla-inbound/rev/8d715...
https://hg.mozilla.org/integration/mozilla-inbound/rev/466d4...
https://hg.mozilla.org/integration/mozilla-inbound/rev/4e892...
https://hg.mozilla.org/integration/mozilla-inbound/rev/55064...
https://hg.mozilla.org/integration/mozilla-inbound/rev/1d3de...
This should enable HiDPI rendering on retina macbooks, except when a non-HiDPI display is also attached (see bug 794038 for multi-/mixed-resolution issues).
Note that until bug 785667 lands, HiDPI users will experience some issues with plugins: in some cases, plugin content will be incorrectly scaled, and/or interaction with controls will be broken.
If you need to work around this until plugin support lands, go to about:config and set "gfx.hidpi.enabled" to 0 (and restart the browser) to revert to non-HiDPI rendering.
Unless this needs to be backed out for unexpected failures, please file new bugs for any remaining glitches in HiDPI rendering, rather than adding to this bug, and mark them as blocking the HiDPI tracker (bug 785330).