Today I managed to release the Stored Variables Viewer plugin for Selenium IDE on firefox addons site. The process was really smooth. I was relieved that I did not face any problems that I had on uploading my first plugin.
Once you install this plugin, a Stored-Vars button will be available in Selenium IDE near the Log pane. Clicking on this button will show the available stored variables and their values. Available only in English for now, more languages will be added on requests.
Get it from the addons website. Let me know if you face any problems.