The new beta update version for TinyUmbrella iOS 8.2 fix release was developed by creator Semaphore aka @notcom. With this tool users will be able to save iOS 8.2 and iOS 8.1.3 SHSH blobs.
Semaphore claims that he has rewritten TinyUmbrella from the ground up, and now it is a lot more easier to use the tool.
Apple company allows users to restore to the latest iOS versions only to prevent from downgrading to an older iOS version, which would have made it easier to jailbreak the iOS device. As the example, in case the company allowed users to downgrade their device, they could downgrade back to iOS 8.1.2, which can be jailbroken using TaiG and PPJailbreak.
Apple stops signing the firmware files, it just doesn't providing SHSH blobs for older iOS versions.
TinyUmbrella iOS 8.2 release allowed you to save the SHSH blobs, so you could use it to create a pre-signed IPSW file, which will be able to restore your device with an iOS version that company was no longer signing.
The TinyUmbrella new version now saves the SHSH blobs automatically for your device, and also you get the option to save the ‘OTA’ SHSH blobs for all devices.
Due to Semaphore report it maybe possible to downgrade to older iOS version using the SHSH blobs. It will be really great if he could do it. Users will be able to downgrade to iOS 8.1.2, for an example, using a custom IPSW firmware file using the SHSH blobs, will ensure that the iOS device can always be jailbroken. It will be useful especially until a jailbreak for the latest iOS version will be launched.