firefox-pr-end-of-file-error
为 Firefox 的 Proxy SwitchyOmega 扩展加了 gfw list，结果导致 `PRENDOFFILEERROR` 错误。属于 VPN 配置问题。
Refers:
- [PRENDOFFILEERROR: 3 Ways to Fix It](https://www.hostinger.com/tutorials/pr_end_of_file_error)
- [PRENDOFFILEERROR | Firefox Support Forum | Mozilla Support](https://support.mozilla.org/en-US/questions/1315880)