Firestar only lilkes certain types of claws.

[Orangepelt]

So, many people have reported this. They couldn't enter Firestar's Maze even though they were talking to him w/ all claws. Now, i've found out why that also happened to me. Now, after i almost beat the game (i was in the last subquest, plot against starclan), i decided there was just some weird bug and travelled to the Tribe Shop. (Thank you, Lightning Speed Seeds) I noticed that it said i had 0 Warrior Claws, so i bought them. Something like this happened when i checked my inventory: (It was before i finished, i ran all the way to the shop to get the actual claws)

When i talked to Firestar, he granted me access. Apparently, theres two different Warrior Claws, and only 1 works? Now, here's either a another bug or a typo: Firestar told me he was going to take the claws, but i still had them all after.

[Orangepelt]

In case you're wondering, the other pair of divine's is for Firestar. Still haven't Beaten him. Does he have an Evade chance of 99%?!
The same glitch happens also with the Reward Gem, like you can see.
And i didn't actually sell 'em, it was just easier to go into that tab.

[Mistyfoot!!!]

For fighting Firestar, I suggest having in your party the following characters: Leafpool, Scourge, Tigerstar, and Squirrelflight (get rid of Squirrelflight once you can get Firestar). I consider this being the best party to deal with anyone because with them, excluding Squirrelflight and including Firestar in her place, you have nearly every move except for a few moves that only bosses can use like Sap Inventory. Make sure Scourge has Apocalyptic Strike. What I found is when you fight the final boss in Plot Against StarClan, one hit from Apocalyptic Strike will kill the boss.

EDIT: Also, in the New Prophecy game, you can use status moves against Firestar like poison, stun, sleep, ect. He won't kill you instantly like in the Original Game!