Chrome, Firefox and Safari added support for chrome.runtime.getVersion(). See WECG issue:
https://github.com/w3c/webextensions/issues/878
While not many extension developers rely on it yet, they eventually will. So having this in Orion will be useful for compatibility reasons.
Implementation should be straightforward as it can be pulled from the manifest file.
Version 1.1.3 (152.1-rc), WebKit 625.1.8
Tahoe (26)
