How do I add a certificate to the browser?

[road8runner]

When using a Bright Data Proxy (WebUnlocker API), I get the following error:

2026-05-12 00:34:59.914 | CRITICAL | main:log_stream:234 - WebSocket ID: 73c98190-0ed2-43d2-bd40-530d3ef436e6 Chrome stderr PID 9: ----- Certificate i=1 (CN=Bright Data Proxy Root CA,O=Bright Data,ST=IL,C=IL) -----
2026-05-12 00:34:59.915 | CRITICAL | main:log_stream:234 - WebSocket ID: 73c98190-0ed2-43d2-bd40-530d3ef436e6 Chrome stderr PID 9: ERROR: No matching issuer found
2026-05-12 00:34:59.915 | CRITICAL | main:log_stream:234 - WebSocket ID: 73c98190-0ed2-43d2-bd40-530d3ef436e6 Chrome stderr PID 9:
2026-05-12 00:34:59.915 | CRITICAL | main:log_stream:234 - WebSocket ID: 73c98190-0ed2-43d2-bd40-530d3ef436e6 Chrome stderr PID 9:
2026-05-12 00:34:59.916 | CRITICAL | main:log_stream:234 - WebSocket ID: 73c98190-0ed2-43d2-bd40-530d3ef436e6 Chrome stderr PID 9: [0512/003459.914206:ERROR:ssl_client_socket_impl.cc(975)] handshake failed; returned -1, SSL error code 1, net_error -202

How do I add my own certificates to the browser?