Testing Sargas' capx in firefox 15:
WebGL enabled : The boss_bomb disappear mid air and then their moving speed accelerates over time.
FPS drop to around 52.
Webgl Disabled : Same as above.
WebGL enabled : Same as above, FPS drop to around 42
WebGL disabled : Same as above
Otherwise the rest of the game plays at a steady 60 FPS in both browsers.
IE9: FPS stays displayed to 60, and animation is smooth.
Though the sprite disappears mid air and accelerates over time like in the previous browser.
The change of speed of the bombs look like the FPS are catching up, a bit like if the code was framerate dependent (even though it isn't, using the bullet behavior on boss_bomb and using dt in quite a few formulas).
Hard to trace the origin of this error in this massive code though. It feels there's some loop/over processing in there.
Tested in r104.