Looks like the versioning scheme is completely different: https://download-installer.cdn.mozilla.net/pub/mobile/releases/ https://download-installer.cdn.mozilla

Looks like the versioning scheme is completely different: https://download-installer.cdn.mozilla.net/pub/mobile/releases/ https://download-installer.cdn.mozilla.net/pub/mobile/releas... only goes up to 68.11 and even that one is from July (the URL came from https://www.mozilla.org/en-US/firefox/all/#product-android-release https://www.mozilla.org/en-US/firefox/all/#product-android-r... which even for nightly shows 68.5(?!)) As best I can tell, they really, really want you to get it from the Play store, which correctly lists the 81 version number: https://play.google.com/store/apps/details?id=org.mozilla.firefox https://play.google.com/store/apps/details?id=org.mozilla.fi... I believe there are extensions which allow one to download apks from the Play store, but I've never tried them F-Droid is similarly crazy: https://f-droid.org/packages/org.mozilla.fennec_fdroid/ https://f-droid.org/packages/org.mozilla.fennec_fdroid/ with an issue about it still unaddressed https://gitlab.com/fdroid/fdroiddata/-/issues/2161 https://gitlab.com/fdroid/fdroiddata/-/issues/2161 I'd guess you'll have to build 81 yourself, or investigate those Play store extractors