Searching for "Facebook Fast Chat" reveals it is likely a reference to FastChat for Facebook
Even in Chrome, you can create a profile named “Fast Chat” with: facebook fast chat browser download
The fastest way to chat is usually to bypass the Facebook newsfeed entirely. The official app is optimized for speed and provides native notifications. Searching for "Facebook Fast Chat" reveals it is
| Feature | Fast Chat Browser | Official Messenger App | Messenger Web (Chrome) | |----------------|------------------|------------------------|--------------------------| | RAM usage | 50–150 MB | 400–800 MB | 200–400 MB | | CPU idle usage | 0–1% | 2–5% | 1–3% | | Startup time | 1-3 sec | 5-10 sec | 3-6 sec | | Distractions | None (only chat) | Stories, games, ads | Full news feed if not careful | | Background processes | None | Yes (messenger.exe, update service) | Yes (Chrome itself) | | Privacy | High (sandboxed) | Low (always on) | Medium | facebook fast chat browser download
Some browsers are built with social media integration directly into the sidebar.