Currently we generate 180x270 thumbnails for screenshot previews. But in Fireplace, even in desktop view, we use 100x150 thumbnails. It should be just a matter of adjusting mkt.constants.submit.APP_PREVIEW_SIZES['mobile'], and writing a script to at least re-generate the thumbnails for the homepage, possibly all existing apps (evaluate depending on how much time it's going to take) Note: we'll still be able to change our minds later if we need to, since we have the preview image itself to generate different sizes of thumbnails from.

STR: - Submit an app, upload a couple screenshots (one landscape, one portrait) - Verify that the thumbnails are correctly displayed in developer pages & consumer pages once the app is approved.

The thumbnails are displayed correctly in both developer pages and consumer pages for a new approved app. I've also tried updating an old app screenshots and the thumbnails are displayed correctly. Please see the screencast: http://screencast.com/t/SJ7Wfu4L Verified on FF31 (Win7) and FFOS 1.4 (Inari) Closing.