User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:36.0) Gecko/20100101 Firefox/36.0 Build ID: 20141014030201 Steps to reproduce: Open Marketplace app (which forces orientation to portrait) and a couple of non-locked apps such as browser or email. In landscape orientation, try to use the edge-swipe gesture to casually switch around through running apps. Actual results: Edge-swiping suddenly stops working when we reach Marketplace, which switches to portrait orientation. Have to either change physical orientation of device, or swipe 'up'/'down' to get back to another app which feels very confusing. Expected results: Swiping through available apps should not unexpectedly change the orientation of the device or stop edge gestures from working.
Hmm, using 'multitasking gestures' on iPad (4-finger swipe left/right) has a similar issue when encountering apps that are locked to a different orientation, so 'state of the art' may be to leave it like this. :( (Of course it'd be nice if apps simply didn't lock the orientation on a tablet when they would work in multiple orientations. iOS has separate orientation-lock options in the app manifest for phone and tablet modes, and Apple encourages app authors to make their iPad apps work in all orientations even if they're locked to portrait on phones.)
Related with bug 992085?