Apple has stopped signing iOS 8.3, making restores and downgrades to the firmware no longer possible.
If you want to stay on iOS 8.3 take care that you do not accidentally update to iOS 8.4 because you won't be able to get back to iOS 8.3. However, since there is a jailbreak of iOS 8.4 you aren't at risk of losing your jailbreak after an update.
Also, you may want to save the SHSH Blobs off your device if you haven't already.
Please follow iClarified on Twitter, Facebook, or RSS for updates.
If you want to stay on iOS 8.3 take care that you do not accidentally update to iOS 8.4 because you won't be able to get back to iOS 8.3. However, since there is a jailbreak of iOS 8.4 you aren't at risk of losing your jailbreak after an update.
Also, you may want to save the SHSH Blobs off your device if you haven't already.
Please follow iClarified on Twitter, Facebook, or RSS for updates.