Update firefox-nightly.rb
Update firefox-nightly.rb

Adding the sha 256 sum
Merge pull request #216 from Nyalab/patch-1

Update firefox-nightly.rb
Update firefox-nightly.rb

Sorry, wrong checksum :-(
Merge pull request #217 from Nyalab/patch-2

Update firefox-nightly.rb
fixed firefox-esr-us class name
Merge pull request #219 from vitorgalvao/fix-firefox-esr-us

fixed firefox-esr-us class name