He was killed by a fox.
He died of greencough.
Russetfur, and Firestar loses a life.
He loses his first life in the battle between Lionclan and Bloodclan in the Darkest Hour
yes he loses a life when hawkfrost tries to kill him for his brohter to have power
Firestar loses his last life in the last book of Omen of the Stars, or so I've been told. Erin Hunter has said that she doesn't know how she is going to make Firestar's death.
Firestar gets crushed by a tree then loses his last life
Yes, in "The Darkest Hour," Firestar loses one of his nine lives in a fight against Bone and his rogues in what is referred to as the "fox trap" at Fourtrees.
Either The Forgotten Warrior or The Last Hope
Yes, Firestar loses his ninth life in the last book of 'Omen of the Stars' series titled "The Last Hope." This marks the end of Firestar's journey as a leader of ThunderClan in the Warrior Cats series.
No. I agree with the first paragraph(original person) but not the second. He doesn't lose his last life. He loses ONE life outof NINE. After Starclan takes one life away, he wakes up in the middle of the battle.
Russetfur, Longtail, Rippletail, Flametail, and Swoop. (Firestar loses a life, but doesn't die completely.)
When the twoleg monster cut one of the trees in ShadowClan territory, the tree smashed Firestar, saving Onewhisker's life. (later Onestar)