Sending logs to support

To help resolve problems in Yandex Browser, Yandex Support asks you to send logs from your computer. Logs help us find the cause of a problem and fix it more quickly.

You don't need any special knowledge to get the logs. This is easy and doesn't take long.

In response to our message, we ask you to send the following log files to support:

  • net-export.json
  • hot_trace.json
  • cold_trace.json
Attention. If the logs you send are not sufficient to resolve the issue, our Support team will contact you and offer remote computer diagnostics. After remote diagnostics, we can give you 10 GB of free space on Yandex Disk with no expiration, to show our appreciation for your cooperation.
How to record logs
  1. Enter browser://net-export/ in the address bar.
  2. Click Start Logging to Disk.
  3. In the file selection box that opens click Save.
  4. On another tab, reproduce the problem with site access (or unresponsiveness).
  5. Return to the browser://net-export/ tab and click Stop Logging.
  6. Send the saved file and problem description to reply to the letter with the request for logs from support.
  1. Enter browser://tracing in the address bar.
  2. Click Record.
  3. In the window that appears, switch the option to Javascript and rendering.
  4. Click  to the right of Edit categories.
  5. In the Disabled by Default Categories column, select memory-infra.
  6. In the lower part of the window, click Record.
  7. Switch back to the tab where the problem occurs, and leave it active for a minute.
  8. Go back to the browser:tracing tab and wait until “Buffer usage:100%”.
  9. Click Stop.
  10. Click Save under the address bar and save the file with the name hot_trace.json. The file is saved in Downloads, which you can open by clicking .
  11. Send the saved file to us in a response to the message from Support requesting logs.
  1. Launch Yandex Browser with the required keys from the command line:
    C:\Users\YOUR_USERNAME\AppData\Local\Yandex\YandexBrowser\Application\browser.exe --trace-startup --trace-startup-duration=30 --trace-startup-file=C:\Users\YOUR_USERNAME\Desktop\cold_trace.json

    Instead of YOUR_USERNAME enter your account name.

  2. Repeat the action that caused the problem, or open the tab that is loading too slowly.
  3. Close Yandex Browser a minute later. The cold_trace.json file appears on the Windows desktop.
  4. Send the saved file to us in a response to the message from Support requesting logs.