Works alright. But please, for the love of god, change the default search shortcut from "c" to something longer like "cl" or "claude" — the hardcoded shortcut makes it impossible to search for anything that starts with "c " (e.g. "c operator precedence" or "c with caron").

Since the default shortcut is baked into manifest.json, I wasn't able to remove it, so I ended up uninstalling the extension. If anyone else is facing the same issue, you can use "claude.ai/new?ext_search=%с" as a plain old Firefox search engine string (Settings > Search > Add).