To accomplish this, it needed to be bundled up in a zip file, so
code to do that was added. (Quite possibly the zip will be able to
be renamed as an .xpi file to create the file needed for Firefox.
At the moment, you must extract this zip and "sideload" the extension
into Edge by selected the extracted folder. I read that Edge will
handle the packing into a single extension file itself.
Also, some of the features used in the extension had to be polyfilled
into Edge. And the final major change is that the "Xray" feature is
not available in Edge, so data passed from the content script to the
script injected into the page had to be moved from Xray to attributes
of the script element. This all represents more progress on #28,
Chrome(ium) is next.
