Testing
1. Create fsrtoolbar@dannyzhang.wordpress.com text file with no extension
2. Inside the text file, put in folder path of where install.rdf resides
eg. D:\Projects\FirefoxEntensions\SERPRank\dev\branches.3.0\fsrtoolbar\
3. Uninstall any existing version of the add-on
3.1 Close Firefox
3.2 Navigate to C:\Documents and Settings\[currentuser]\Application Data\Mozilla\Firefox\Profiles\ghbqw83s.Developer\extensions\
3.3 delete fsrtoolbar@dannyzhang.wordpress.com from there if one already exists
3.4 Start Firefox app
4. Installing the add-on
4.1 Close firefox app
4.2 Copy the text file to C:\Documents and Settings\[currentuser]\Application Data\Mozilla\Firefox\Profiles\ghbqw83s.Developer\extensions\
4.3 Start Firefox
Releasing
Packaging file as zip but give it .xpi as extention
See this for instructions
http://roachfiend.com/archives/2004/12/08/how-to-create-firefox-extensions/#testing
Installing
to install xpi file to Firefox, drag and drop .xpi file on to FireFox Add-ons manager
source: http://www.browserland.com/how-to/how-to-install-xpi-and-jar-firefox-add-ons-and-themes/