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We need to keep the underlying <browser> element scroll position sync'ed with the canvas tiles. There are many problems that arise because we don't

Current Status

There are patches in a few of the related bugs. One of the patches landed, but was backed out due to panning performance reasons.

Next Steps

  • Create an improved patch
  • Find a way to test the affect on performance

Related Bugs

bug 511987 bug 500700 bug 514623 bug 479862


  • Project Lead:
  • Team Members: stechz, vingtetun



Goals/Use Cases

  • Fix as many of the scroll-sync related bugs as possible
  • Don't regress panning performance

Non Goals

  • There may be some CSS positioning bugs we can't fix using this approach