[Fire TV Android Development] rbox:
Here are prerooted stock images for use with my recovery. Note that these contain addon.d support, so any 3rd party things you install to /system need an addon.d script to be retained between flashes.

If you are currently on FireOS3 and CWM you MUST install TWRP recovery from the link above before using these.

Can't cd to /sdcard after using su? Install this TWRP flashable zip to fix it.

Changelog and Downloads:

July 4, 2020 - 5.2.7.3_r1 (md5sum: 92824186b5eec7e86792897bfb9593b7)

December 7, 2019 - 5.2.7.2_r1 (md5sum: 8dd08a41900a75794f28c455e173141f)

June 29, 2019 - 5.2.7.0_r1 (md5sum: 97b9ffef275d7dffcae085b2325aa9cc)

March 30, 2019 - 5.2.6.9_r1 (md5sum: 2f00ee478118ccf034b70236357ee0a3)

November 27, 2018 - 5.2.6.7_r1 (md5sum: cc455830d78f2d545760f1705dbe4f63)

October 7, 2018 - 5.2.6.6_r1 (md5sum: de48df30cadf9f88865698d3a3e514ef)

June 24, 2018 - 5.2.6.3_r1 (md5sum: c4fcecc0d3dda3f5c58ba9bbc1fddbdc)

January 28, 2018 - 5.2.6.2_r1 (md5sum: facfcc900ac21e70023b6fbf7259b5b0)

October 8, 2017 - 5.2.6.0_r1 (md5sum: 126fffd4f2384a483792b336b0c89b83

July 3, 2017 - 5.2.4.1_r2 (md5sum: ee25fe57cce08dce6c5962871916c7e3

May 1, 2017 - 5.2.4.1_r1 (md5sum: 64451a8f88cb5a3fff53f14c80ba2267)

January 31, 2017 - 5.2.1.2_r1 (md5sum: 4a01e9a4e6bdcb98da97d2438bf5066d)

September 3, 2016 - 5.2.1.1_r1 (md5sum: 4c4cc2b9dc01cf8397905712b8c91ae3)

July 4, 2016

5.2.1.0_r1 (md5sum: c465bbbddaf3254f805bddbf2d162637)

5.0.5_r2 (md5sum: 32c869fff5e39a5c0d2f5f48b3a10ef5)

This includes the same 2ndinit as before and TWRP version 3.0.0-7. This version of TWRP has support for 720p and fixes the crashing/looping.

May 20, 2016 - 5.0.5.1_r1 (md5sum: 5398851cb37ecd6c5df80abe1cc85447)

This includes 2ndinit version a7a48c and TWRP version 3.0.0-6.

May 20, 2016 - 5.0.5_r1 (md5sum: 924dadb59d73083704844bb27f189449)

This includes 2ndinit version a7a48c and TWRP version 3.0.0-6.

Everything below here is FireOS3.

September 7, 2015 - Added 51.1.6.3_516012020 (md5sum: fcf1a8ddf2f3bc93280af03dcf408ac8)

This update requires FireTV Boot Menu.

If you don't already have 51.1.4.0 or newer, you must flash 51.1.4.0 first.

August 20, 2015 - Added 51.1.6.2_516011120 (md5sum: 3fd1cc67fdd3351b470d09cff586fbf8)

This update requires FireTV Boot Menu.

If you don't already have 51.1.4.0 or newer, you must flash 51.1.4.0 first.

July 21, 2015 - Added 51.1.6.1_516010220 (md5sum: 61ae1e646c970faf137e9a31d64a1316)

This update requires FireTV Boot Menu.

If you don't already have 51.1.4.0 or newer, you must flash 51.1.4.0 first.

July 9, 2015 - Added 51.1.6.0_516009820 (md5sum: a1b550d1a7b21a348ca6bd0d7127427c)

This update requires FireTV Boot Menu.

If you don't already have 51.1.4.0 or newer, you must flash 51.1.4.0 first.

May 24, 2015 - Added 51.1.5.3_515040320 (md5sum: a12852edbe6dc24146533f43e0ae4a05)

This update requires FireTV Boot Menu.

If you don't already have 51.1.4.0 or newer, you must flash 51.1.4.0 first.

Apr 15, 2015 - Added 51.1.5.0_515030720 (md5sum: de2ab7f2d3072e10d3e592b73ca52750)

This update requires FireTV Boot Menu.

If you don't already have 51.1.4.0 or newer, you must flash 51.1.4.0 first.

Mar 26, 2015 - Added 51.1.5.0_515020820 (md5sum: b7005dd3cc0b6a15dae21b0170aeae85)

This update requires FireTV Boot Menu.

If you don't already have 51.1.4.0 or newer, you must flash 51.1.4.0 first.

Nov 21, 2014 - Added 51.1.4.1_514013920+fixed (md5sum: 4429327daeed0df852731d81fa9b1f54)

Starting with this update, this requires FireTV Boot Menu.

You also must ensure you have already flashed 51.1.4.0.

Nov 19, 2014 - Added 51.1.4.1_514013920 (md5sum: 348c8b23d785177f7dfd45cc2ef19626)

Oct 30, 2014 - Added 51.1.4.0_514006420+updated (md5sum: b1b48348cb56c0b83a3affc9fd06e07e)

This fixes the Netflix problem from the original 51.1.4.0. After flashing and rebooting, you might get a hung black screen. If that is the case, just pull the power and plug it back in. Also, Netflix might be broken for International people using DNS unblocking. Please let me know if it works/doesn't work for you when using DNS unblocking.

Oct 29, 2014 - Added 51.1.4.0_514006420[/URL] (md5sum: 98074ae3dead5c12ce77d735c2126b80)

Oct 02, 2014 - Added 51.1.3.0_513011820 (md5sum: 8a7b02691760abf11db4c1c583c20d8f)

Sep 20, 2014 - Added 51.1.3.0_513011520 (md5sum: 2dbd022eacbad0b001753d7519f0ad1b)

Sep 19, 2014 - Added 51.1.1.0_511070220 (md5sum: f98fe5b7de4acb5d2dfa4d8586179b98)