@johnjames001 "Speed Dial" is nothing more than a specialized view of the bookmark folder that has been assigned "Speed Dial" status. Any/every bookmark folder is eligible for this status, assigned by context menu, and all of the bookmarks in such folders behave just as all bookmarks in all folders.
@vongalin - that's a very particular setup you have. Thanks for describing it; certainly something to ponder.
Maybe you got the idea for doing this from a spy movie 😉 CCleaner does a reasonable job of cleaning up our browsers' traces, as long as you remove the (paid for?) cookie exceptions in the options. All the rest it can nuke too, I believe.
Pay attention to its other settings that try to sneak it in as a TSR.
BTW, the European Union is in the throes of mandating global privacy protection in websites that visit the EU, that is, every website in existence. There are penalties that would bankrupt most website holders in an instant, so, like 'We are storing cookies' popups, and unlike the ignored 'Do not track' setting, this should have a marked effect on privacy on the internet. If that is your concern.
it does work sometimes from the main site. it fails mostly when you click from the bookmarks or direct from URL bar. also I clicked those links in your post and they didn't show up except for "rokfin.com" and "/feed", those do leave traces.
usually it works, if you copy the folder "Users\<username>\AppData\Local\Vivaldi\User Data\Default"
If you only need your session, it is sufficient to copy the folder "\AppData\Local\Vivaldi\User Data\Default\Sessions"
Hopfully these folders are still present in Windows.old
Update Vivaldi to latest version
You can test with a 5.3 Snapshot Standalone installation if that solves the issue,
this will not affect your original 5.2 Stable profile.
Update your Windows to get latest SSL root certificates.
Tell us which URL cause such trouble
Turns out this has to do something with the latest version itself.
Done a reset, saved everything, downloaded 5.1 installed that and everything was fine and dandy.
Today it auto updated to 5.2 and again it's dying.
I redid everything again, so 5.1 is working, auto update is disabled.
Tried to set up sync to add a layer of protection, but it refuses and tells me that i need to update to use sync.
So that is a dead end.
@LorenAmelang, setting it to Forever seems to have done it, yes. Or, potentially something else. I guess I'll never know for sure, but... well, I have three days worth in my history now, so that's good at least?