You can also try these related scripts:

• Bundle Stars Keys Retrieve - Retrieve keys from Bundle Stars
• Steam Bundle Sites Extension - A steam bundle sites' tool kits.
• Bundle Helper - Add tools for many bundle sites.
• Bundle Helper Reborn - Marks owned/ignored/wishlisted games on several sites, and also adds a button to open the steam page for each game.
• AutoJoin IndieGala Giveaways (improved) - AutoJoin for IndieGala Giveaways!