Adds a button on Steam's 'Inventory' and 'Booster Pack Creator' pages.
These allow you to Open and Create set of booster packs immediately with one click, instead of one-by-one and having to wait through the animations.
The Appid's for booster packs to create must be set via the extentions page -> options.
You can get appid's via the URL or an external website like steamdb.
Example: Mass Effect Legendary Edition booster pack URL,
https://steamcommunity.com/tradingcards/boostercreator/#1328670 1328670 would be the appid.
*Requires you to be logged into your Steam account in Firefox.
