===Packaging the extension===
TODOOnce debugging and testing is complete, you'll want to [http://developer.mozilla.org/en/docs/Extension_Packaging create an installable .xpi file] to give to your users. As was previously mentioned, .xpi files are just .zip files with a different extension. All .xpi files must contain the '''install.rdf''' file in the root (i.e., when you unzip it, install.rdf should be in the top directory). Follow these steps to create an installable .xpi: # Create a new zip file named '''addtabbeside.zip''' (NOTE: you can use .xpi instead of .zip if your application will allow it).# Add your extension files and directories to '''addtabbeside.zip''', making sure that '''install.rdf''' is in the root (i.e., don't zip the addtabbeside directory itself, just it's contents).# Rename the resulting file to '''addtabbeside.xpi''' You can try installing your extension in a browser that doesn't have it by simply dragging '''addtabbeside.xpi''' into it. This should trigger the add-on manager and give you the option to install your extension and restart the browser.
==Success, and some bugs==
