install
Installs the Chrome extension from the given CRX file.
The crxFile must lead to a CRX file. No publisher proof is required.
If the extension is already installed, this method returns it.
If the CRX file contains a newer version of the extension, this method updates the installed extension and returns an instance of the updated extension.
Return
the installed Chrome extension
Parameters
crx
the path to the extension CRX package
Throws
if the extension installation has failed or if a newer version of the extension is already installed
when the engine is closed or the profile is deleted