Privacy Policy

Fallen London Companion browser extension — Last updated May 2026

What data is stored

The extension uses the browser's storage API solely to persist your Echoes Per Action (EPA) counters between browser sessions — the running action count and echo totals you accumulate while playing. This data:

• is stored locally on your device only
• is never transmitted anywhere
• contains no personal information — only two numbers (actions and echoes)
• can be cleared at any time by removing the extension

What the extension reads

The extension runs on www.fallenlondon.com and reads the game's own API responses as they arrive in your browser. This is used to annotate the page with echo values, challenge information, and Bone Market data. The extension:

• does not send any API responses or game data to external servers
• does not read your account credentials or payment information
• does not access any page outside of www.fallenlondon.com

No tracking, no analytics

The extension contains no analytics, telemetry, crash reporting, or tracking of any kind. No third-party SDKs are included. Your usage of the extension is not observed or recorded in any way.

Network requests

Most extension features work by reading the game's own API responses locally — no outbound requests of their own. The one exception is the Optimal Loadout feature: when you tap the + button next to a challenge, the extension sends a request to api.fallenlondon.com on your behalf to equip the highest-rated item for that skill, using the same credentials the game already has in your browser session. This request:

• goes only to Failbetter's own API — no third party is involved
• is triggered solely by your explicit tap on the + button
• sends no personal data beyond what the game's normal requests send

Open source

The full source code is publicly available on GitHub. Anyone can verify these claims by reading the code directly.

Contact

Questions or concerns? Open an issue on GitHub.