port.js is an expanded version of Michael Gundlach’s Chrome (and Opera!)–to–Safari porting library for extensions.
Add as the first script to your Safari property-list file (created by the Extension Builder) and to your Chrome and Opera manifest files, background pages, and options pages.
Then use chrome.* APIs as usual and check the global SAFARI boolean for
implementing browser-specific functionality. The safari.* APIs will still be
available in Safari and the chrome.* APIs unchanged in Chrome and Opera.
Copyright 2010–2012 Michael Gundlach
Copyright 2012, 2013 Disconnect, Inc.
Copyright 2014–2019 Brian Kennish
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.