Merge pull request #51 from abelfodil/master

Add data collection permissions to manifest.json

Merge pull request #48 from benmuth/firefox-fixes

Merge branch 'master' into firefox-fixes

Merge pull request #47 from benmuth/auto-archiving

Make popup initialization more robust.

Make server test requests from background script.

Fix CSP error.

Clean up message passing.

Change callback-based message passing in popup.js.

Change manifest.json for Firefox compatibility.

Simplify auto-archiving configuration.

Remove unnecessary change to enable_auto_archive.

Add comments and clarify auto-archiving code.

Don't save an extra snapshot from the context menu.