STR (1) Install Phony (2) Clear private data (3) Switch to the desktop FF UA (4) Load gmail.com (5) Zoom and pan around the page I don't reproduce any of these issues reliably, but I've seen - gmail stops rerendering, or rerenders at the wrong resolution, so always looks fuzzy - iframe width isn't calculated properly on fuzzy-zoom, so when panning to the right to a location that should have been gmail-outside-of-window, I pull in the fennec sidebar instead of seeing checkerboard - get an all-gray window, can't pan or zoom content back into view - can pan "to the right" of the scroll indicator; I see the scroll indicator go from right to left across the window - content process crashes These aren't hard to trigger.
We may not block on problems with desktop gmail, since it's hard to get it to load, but the issues in comment 0 look like deeper problems with bug 605618.
Let's identify problems related to iframe panning. We have other bugs for rendering issues.
Ben - let's break this bug apart into smaller bugs. Some may already be filed. This bug is too "meta"
Ben needs to figure out what in this bug is a blocker and what is not.
Reopen and file specific bugs as needed.