Creating a package for our add-on

Add-ons are generally packaged in zip files, with an XPI (Cross-Platform Installer) file extension. So, zip up all the files of the add-on folder. ( Note: Zip the files in the DDG_ add-on folder, in our case: content folder, install.rdf and chrome.manifest. When you open the zip file, you must see these files.) You can do this easily in Windows 7; just select all the files and sub-folders from our add-on ( DDG_addon) folder, right click and select Send To -> “Compressed (Zipped) Folder”. A .zip file, DDG_addon.zip, will be