#49 Crashes if downloaded package is unsigned

Currently the latest Firefox Lite release is version 2.6.0.

Unlike the previous version, the released apk for 2.6.0 is unsigned: https://github.com/mozilla-mobile/FirefoxLite/releases/download/v2.6.0/FirefoxLite-2.6.0-20651-release-unsigned.apk

Thus ffupdater crashes when trying to verify the fingerprint of the downloaded apk file:

java.lang.NullPointerException at FingerprintValidator.kt:32
java.lang.NullPointerException

java.lang.NullPointerException
    at de.marmaro.krt.ffupdater.security.FingerprintValidator.checkApkFile(FingerprintValidator.kt:32)
    at de.marmaro.krt.ffupdater.InstallActivity$State$8$fingerprint$1.invokeSuspend(InstallActivity.kt:236)
    at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
    at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
    at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:571)
    at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:750)
    at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:678)
    at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:665)


Android Version: 30
Device Manufacturer: Xiaomi
Device Model: Mi Note 10

This is a big problem.

Even if FFUpdater won't crash, you wouldn't be able to update FirefoxLite. Android requires that the signature of the old and the new version of an app must match.

I add a comment to the existing issue on the Github page https://github.com/mozilla-mobile/FirefoxLite/issues/5353 - maybe the developers will respond to it.

What should I do when the developers don't respond? Should I remove FirefoxLite from FFUpdater because it's not longer active developed? But security holes are stilled fixed according to this section in the README:

Notice - Firefox Lite is currently in Maintenance Mode. No active feature is being done on the product. Older Pull Requests and Issues have been marked with the archived label and have been closed. However, if you feel an issue is critical enough to be re-opened, please leave a note on the issue with an explanation.

I will remove Firefox Lite for now. If the developers publish a signed update, I can revert my changes.