Historically, clicking and searching in the old forum might have presented URLs such as these:
https://forums.ghostbsd.org/viewtopic.php?p=11338#p11338
or https://forums.ghostbsd.org/viewtopic.php?f=69&t=2525&p=11338
for an opening post
https://forums.ghostbsd.org/viewtopic.php?f=69&t=2525
for the topic
– so it's not unusual to find links using the ⋯?f=⋯&t=⋯ style of URL. We might think of this style as a historic norm for phpBB.
Canonical URLs
Expect canonical URLs to be archived in the Wayback Machine and elsewhere.
Please note
URLs such as https://forums.ghostbsd.org/viewtopic.php?f=69&t=2525 were normal but not canonical. So, for example, https://old-forums.ghostbsd.org/viewtopic.php?f=69&t=2525 – the result of a redirect – is not canonical. The current canonical URL for this example:
– without the f reference number.
I use the Canonical extension for Mozilla Firefox. YMMV, I guess that something similar exists for Chromium and so on.