Add icons to the Chrome extensions
Remove the test of experimental properties in workers
Update l10n/pl/viewer.properties
Update README.md

Pdf.js has been integrated into Firefox :)
Merge pull request #2743 from vyv03354/fx19release

Update README.md
Merge pull request #2741 from piotrex/master

viewer.properties - Polish lang : English file -> Polish and translated new values
Merge pull request #2732 from vyv03354/issue2728

Remove the test of experimental properties in workers
Merge pull request #2731 from AluisioASG/d18f8d11bc7b5157e727b82eccdec6676f4bca07

Add icons to the Chrome extension
Merge remote-tracking branch 'upstream/master' into page-wise-scrolling
Context menu fix