* New upstream release from the beta channel (FIREFOX_76_0b3_BUILD1)
* Update patches
  - debian/patches/ubuntu-ua-string-changes.patch
  - debian/patches/cleanup-old-distribution-search-engines.patch
* Drop obsolete patches
  - debian/patches/s390x-authenticator.patch
  - debian/patches/mark-distribution-search-engines-as-read-only.patch
* Separately installed browser/blocklist.xml was removed
  - debian/firefox.install.in
* Bump build-dep on nasm >= 2.14.02
  - debian/control{,.in}
* Port packaging to python3