After I switch focus to Tor Browser, I noticed when I hover my cursor over the address bar, or any text field, it flickers a lot when I move the mouse. If I press the left Ctrl key, Tor Browser closes tabs very quickly as if Ctrl+W had been pressed many times or quits entirely if there are no tabs left. Icons like the Tor Browser security level button do not show their hover text for long, it flashes instantly. If I press a key like “J” then it stops flickering and tabs do not close when I press Ctrl. However, the problem can return again.
- Operating System you are using: Ubuntu 24.04.3 LTS
- Tor Browser version: 14.5.6
- Tor Browser Security Level: Standard
- Step by step of how you got to the issue, so we can reproduce it (e.g. I opened the browser, typed a url, clicked on (i) icon, then my browser crashed)
- I opened Tor Browser either from the
torbrowser-launcherversion or from the .tar.xz version downloaded from the Tor Project website. - I pressed Ctrl soon after focusing on the Tor Browser window. But this is not a requirement, it can happen far later too.
- Tabs close in rapid succession or the browser exits (depending on how many tabs are there).
- (optional) A screenshot of the problem
- The Tor log
2025-09-12 13:02:21.319 [NOTICE] DisableNetwork is set. Tor will not make or accept non-control network connections. Shutting down all existing connections. 2025-09-12 13:02:21.323 [NOTICE] DisableNetwork is set. Tor will not make or accept non-control network connections. Shutting down all existing connections. 2025-09-12 13:02:21.325 [NOTICE] DisableNetwork is set. Tor will not make or accept non-control network connections. Shutting down all existing connections. 2025-09-12 13:02:21.358 [NOTICE] Opening Socks listener on 127.0.0.1:9150 2025-09-12 13:02:21.358 [NOTICE] Opened Socks listener connection (ready) on 127.0.0.1:9150 2025-09-12 13:02:22.395 [NOTICE] Bootstrapped 5% (conn): Connecting to a relay 2025-09-12 13:02:22.397 [NOTICE] Bootstrapped 10% (conn_done): Connected to a relay 2025-09-12 13:02:22.442 [NOTICE] Bootstrapped 14% (handshake): Handshaking with a relay 2025-09-12 13:02:22.558 [NOTICE] Bootstrapped 15% (handshake_done): Handshake with a relay done 2025-09-12 13:02:22.559 [NOTICE] Bootstrapped 75% (enough_dirinfo): Loaded enough directory info to build circuits 2025-09-12 13:02:22.559 [NOTICE] Bootstrapped 90% (ap_handshake_done): Handshake finished with a relay to build circuits 2025-09-12 13:02:22.559 [NOTICE] Bootstrapped 95% (circuit_create): Establishing a Tor circuit 2025-09-12 13:02:22.891 [NOTICE] Bootstrapped 100% (done): Done
I used Tor Browser for several days without this being much of a problem. It happened occasionally that I would lose some tabs. But now I can always reproduce it, and it is annoying. I wonder if someone else can reproduce it too or if this is specific to my system.