Roblox Player Notifier by Luke

Roblox Player Notifier lets you build a personal watchlist of Roblox usernames or user IDs and get real-time browser notifications whenever one of them comes online, joins a game, opens Roblox Studio, or goes offline.
Features:
• Toggle notifications independently for each status type (online/in-game/Studio/offline)
• Click a notification to jump straight to that player's Roblox profile
• Built-in Logs tab showing a rolling 7-day history of watchlist activity
• Toolbar badge shows how many watched players are currently active
Requires being logged in to roblox.com in your browser — the extension uses your existing session to check player status via Roblox's own API. No account credentials are entered into the extension, and no data is collected or sent anywhere except directly to Roblox.