I'm just wondering how I can configure the SQLite Manager plugin in Firefox so that it recognises .sqlite3 extensions?

I've created a new Rails project and generated a scaffold application using the command:

rails generate scaffold Post title:string
I've then created the database using the command:

rake db:migrate
and I want to look at what has been created in the database by using the Firefox SQLite Manager plugin. However, as I understand, I need to configure it so that it recognises .sqlite3 extensions.

I can't find anything in any of the menus on the plugin that lets me specify that it should recognise .sqlite3 extensions... could someone please point me in the right direction?