Firefox RDM Extended presets

settings.json

[{"name": "CGA: 320x200", "width": 320, "height": 200},
{"name": "QVGA: 320x240", "width": 320, "height": 240},
{"name": "CIF: 352x288", "width": 352, "height": 288},
{"name": "SIF: 384x288", "width": 384, "height": 288},
{"name": "HVGA: 480x320", "width": 480, "height": 320},
{"name": "VGA (NTSC): 640x480", "width": 640, "height": 480},
{"name": "PAL: 768x576", "width": 768, "height": 576},
{"name": "WVGA: 800x480", "width": 800, "height": 480},
{"name": "SVGA: 800x600", "width": 800, "height": 600},
{"name": "WVGA (NTSC): 854x480", "width": 854, "height": 480},
{"name": "PAL: 1024x576", "width": 1024, "height": 576},
{"name": "WSVGA", "width": 1024, "height": 600},
{"name": "XGA: 1024x768", "width": 1024, "height": 768},
{"name": "1152x768", "width": 1152, "height": 768},
{"name": "XGA: 1152x864", "width": 1152, "height": 864},
{"name": "WXGA: 1280x600", "width": 1280, "height": 600},
{"name": "HD 720: 1280x720", "width": 1280, "height": 720},
{"name": "WXGA: 1280x768", "width": 1280, "height": 768},
{"name": "WXGA: 1280x800", "width": 1280, "height": 800},
{"name": "SXGA: 1280x1024", "width": 1280, "height": 1024},
{"name": "980x1280", "width": 980, "height": 1280},
{"name": "Microsoft Surface RT: 320x240", "width": 1366, "height": 768},
{"name": "1400x900", "width": 1400, "height": 900},
{"name": "1400x960", "width": 1400, "height": 960},
{"name": "SXGA+: 1400x1050", "width": 1400, "height": 1050},
{"name": "1400x1080", "width": 1400, "height": 1080},
{"name": "1600x900", "width": 1600, "height": 900},
{"name": "UXGA: 1600x1200", "width": 1600, "height": 1200},
{"name": "WSXGA+: 1680x1050", "width": 1680, "height": 1050},
{"name": "1920x900", "width": 1920, "height": 900},
{"name": "HD 1080: 1920x1080", "width": 1920, "height": 1080},
{"name": "WUXGA: 1920x1200", "width": 1920, "height": 1200},
{"name": "2K: 2048x1080", "width": 2048, "height": 1080},
{"name": "QXGA: 2048x1536", "width": 2048, "height": 1536},
{"name": "WQHD: 2560x1440", "width": 2560, "height": 1440},
{"name": "WQXGA: 2560x1600", "width": 2560, "height": 1600},
{"name": "QSXGA: 2560x2048", "width": 2560, "height": 2048},
{"name": "2160p: 3840x2160", "width": 3840, "height": 2160},
{"name": "4k: 4096x2160", "width": 4096, "height": 2160},
{"name": "4320p: 7680x4320", "width": 7680, "height": 4320},
{"name": "8k: 8192x4608", "width": 8192, "height": 4608},
{"name": "8640p: 15360x8340", "width": 15360, "height": 8640}]

http://g-liu.com/blog/2013/08/firefox-rdm-presets/