[Webkit-unassigned] [Bug 260122] New: Frequently unable to navigate for up to 30 minutes at a time

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=260122

            Bug ID: 260122
           Summary: Frequently unable to navigate for up to 30 minutes at
                    a time
           Product: WebKit
           Version: Safari 16
          Hardware: Mac (Apple Silicon)
                OS: macOS 13
            Status: NEW
          Severity: Major
          Priority: P2
         Component: WebKit Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jamie at birch-family.me.uk

Created attachment 467257

  --> https://bugs.webkit.org/attachment.cgi?id=467257&action=review

sysdiagnose during incident

# Issue

At least for some months, Safari (currently using v16.5.2 on Ventura 13.4.1c) has, at random moments, been losing all ability to navigate to any website, with incidents lasting about 5-30 mins before self-resolving (though sometimes manual resolution is possible). Browsing in Firefox during these periods works fine.


# Characterisation

Best explained by the screen recording linked below, but here are some characteristics of it:

1) Private browsing sometimes (as in the screen recording), but not always, fixes it, though only in the private window and not existing windows.

2) Restarting the computer sometimes, but not always, fixes it

3) Disabling all extensions sometimes, but not always (as above), fixes it

4) Switching WiFi from IPv6 (domestic) to IPv4 (4G) doesn't fix it

5) I have no such problems on iOS 16.5 Safari on either of the networks mentioned in (4).

6) Navigation will spontaneously recover after waiting up to about 30 mins (which may explain some of above "sometimes, but not always" fixes).


See:

- the attached sysdiagnose files
- the Console output for the "Safari" process during a 10-minute incident: https://gist.github.com/shirakaba/857752915eef491d327beb1e6e023b55
- screen recording of an earlier incident in-progress: https://twitter.com/LinguaBrowse/status/1686518457305792516


## Extensions in use

As noted above, disabling extensions doesn't always fix things, but here is what I'm using in any case.

- 10ten Japanese Reader
- 1Password for Safari
- Ghostery
- LinguaBrowse (disabled)
- Userscripts


## Websites visited

Generally twitter.com, news.ycombinator.com, and stackoverflow.com. I'm based in Japan.

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