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With new version 100.0.4815.76 (or the one .5x before), the bookmark folder names aren't partially not shown anymore. I'm sure they were there with the previous build .54(?)
Missing names of the folders are "Prio 1" and "Prio 2".
Folder names on the parent and childs are shown.
Another poll/request/wish to get tab grouping / stacking in Opera soon?
google-chrome-will-get-new-tab-groups-feature-future-update
THANKS
Also lost my tabs again from only one workspace, but not after the latest update:
Problem: After a download of a PDF I double clicked in the download notification and it should open - but it didn't for me - but it did on the 2nd monitor but on this I'd running my company laptop on HDMI 2 for days.
Only in rare cases I switch the 2nd monitor to HDMI 1 - my PC 2nd monitor.
Finally the Opera window 2 was open on HDMI 2 which I've never seen. Closed Opera on main window last night. Turned on today. All tabs lost on first workspace - maybe because from that I'd opened the PDF.
I noticed this situation ~ 10 days ago when I lost all tabs in another workspace. In this case I've moved a window to the 2nd monitor, closed the window first, then the main window. But next day I'd lost them also.
There should be a warning when closing the Opera main window (started first) and another Opera window is open so we can cancel and close the other Opera windows first - also on not active 2nd monitor.
However - my little small Opera startup script saved it all 
and I was able to restore the previous session with all tabs - more or less.
I recommend to use it until Opera has a better solution:
Shift and clicking the "+" ("Press to open new tab") should "duplicate" the current selected tab.
Ctrl and clicking the "+" ("Press to open new tab") should "duplicate" the current selected tab - but point to the root of the domain (without path)
(e..g. instead of "https://www.discogs.com/release/37247" => "https://www.discogs.com/")
The new opened tabs might be auto-positioned right beside the current selected tab and get active of course.
Alt and clicking the "+" ("Press to open new tab") could (also) "reopen last closed tab".
So I can use my one hand for keyboard and needn't remove the other hand from the mouse.
When I click on a Mixcloud link (which I receive per email) - Opera loads Mixcloud and before the mix starts to play Opera results in:
There is still enough memory - the problem is the process. Did not happen with Opera 66.
When opening a Markdown file (local double click or via http) it would be nice if Opera would display this file "nice" and not like as a simple .txt file.
Opera could offer various CSS styles (incl. plain txt of course) in preferences how to open .md files.
A right click context menu on the .md page to choose quickly another CSS style would be also good.
In March 2016, text/markdown was registered as RFC7763 at IETF.
https://daringfireball.net/projects/markdown/syntax#link
and google around 
@burnout426 Thanks a lot. Will try with Opera 67 when it works. Had to downgrade.
@aoirei Yes , Opera 12 tab stacking. All the time most used feature ever. Missing it so much. Just have 34 tabs open - from sw development, music, shares, social, lottery & betting .. would love to group / stack them within tab groups / tab stacking within one Opera window.
Thanks burnout426.
Done with bug report DNAWIZ-95025.
How can I delete all cookies and other cached things of websites which I haven't visited the past month or whatever?
I only want to specify a date and run delete.
I've just l looked into %LOCALAPPDATA%\Opera Software\Opera Stable:
The folder "Media Cache" has only files created & modified back in 2019. It looks like this folder isn't used anymore and I can delete?
The folder "Certificate Revocation Info" has only files created & modified back in 2018. It looks like this folder isn't used anymore and I can delete?
The folder "System Cache\Cache_Data" has 5 files and only data_0, data_1, data_2 have actual modified timestamp. data_3 and index are from 2022-01-23 (modified, created).
The folder "Cache\Cache Data" has 916 files and only 20 are older than a month.
The folder "Default\Cache\Cache_Data" has 1860 files and all have creation date from the past week.
The folder "Default\System Cache\Cache_Data" has 5 files (data_0 - data_3, index - all with actual file dates.
I'm wondering that there is no option to delete the data as requested in my question. Or I only can't find it.
Maybe there are some old local app folders which I can delete? I looks so. I' using 103.0.4928.34.
Thanks for the help - and clean-up support.
Also lost my tabs again from only one workspace, but not after the latest update:
Problem: After a download of a PDF I double clicked in the download notification and it should open - but it didn't for me - but it did on the 2nd monitor but on this I'd running my company laptop on HDMI 2 for days.
Only in rare cases I switch the 2nd monitor to HDMI 1 - my PC 2nd monitor.
Finally the Opera window 2 was open on HDMI 2 which I've never seen. Closed Opera on main window last night. Turned on today. All tabs lost on first workspace - maybe because from that I'd opened the PDF.
I noticed this situation ~ 10 days ago when I lost all tabs in another workspace. In this case I've moved a window to the 2nd monitor, closed the window first, then the main window. But next day I'd lost them also.
There should be a warning when closing the Opera main window (started first) and another Opera window is open so we can cancel and close the other Opera windows first - also on not active 2nd monitor.
However - my little small Opera startup script saved it all and I was able to restore the previous session with all tabs - more or less.
I recommend to use it until Opera has a better solution:
@fuzi1968: Herumgespielt. Default auf Disabled gestellt. Gepinnt. Facebook reloaded. Eingeschalten. Funktioniert. Warum bei Einstellung für alle Seiten es nicht funktionierte, muss ich noch herausfinden und mehrere Seiten testen. DANKE
Soeben installiert, aber auf Facebook leider noch immer die Kommentare (von einem Freund) so wie geschrieben zu lesen (trotz Refresh etc). Bsp: Klimaaktivist*innen, Lehrer*innen
@burnout426
Thanks a lot. Didn't try to delete the Cookies.
I'm on the site every day multiple times and it happend from one update to the other.
However - thanks a lot.
With latest Opera 100.0.4815.76 and with just updated 101.0.4843.25 the Comment area is not shown anymore WHEN I AM LOGGED IN but works in MS Edge 115.0.1901.183.
Activation of ad blocker and / or tracker doesn't help.
Website: https://www.krone.at/3070472
Please fix asap priority 1.
Opera:
In https://forums.opera.com/topic/60169/reopen-multiple-closed-windows-with-many-tabs/12
I've posted a CMD file which helps you to copy all latest session + tabs files away before you start Opera with this helper. I've no experience with Session Buddy. Maybe later.
All tests with MS Edge 114.0.1823.82
Testupload of image from "L:\Name1 Name2\Bugs\Opera\Missing bookmark name\2023-07-19_07-11-41.jpg" (fails)
""
Upload from "L:\Name1 Name2\2023-07-19_07-11-41.jpg" (ok)
Upload from "L:\Name1 Name2\Bugs\Opera\MBN\2023-07-19_07-11-41.jpg" (ok).
Upload from "L:\Name1 Name2\Bugs\Opera\Missing bookmark\2023-07-19_07-11-41.jpg" (ok)
It looks like multiple spaces inside a path part "Missing bookmark name" is the reason why it fails.
I hope this helps.
I just wrote a small Opera start helper which copies the latest session and tabs files into a temp folder before Opera will be started.
So in case of an error (wrong close order, crash, etc.) you have the lastest sessions and can restore the latest correct session until a better session history logic is implemented in Opera.
Save the code below into CMD file and create a link on your desktop. Start Opera with this file in the future.
Old session or tabs files must be deleted manually e.g. every month. CMD isn't Bash to implement a better workaround and I have no time.
Last 11 days require 123 MB in my case. Nothing.
@echo off
REM ########################################
REM # File ...: Opera-Start.cmd
REM ########################################
REM #
REM # Purpose
REM #
REM # Starts Opera but copies latest session files into a backup folder before Opera starts.
REM #
REM # Reason
REM #
REM # In case of lost session or tabs files it keeps all previous sessions.
REM #
REM # Description
REM #
REM # Change the variable "SessionBackupPath" to your preferred backup folder.
REM # Currently you must manually delete older files. E.g. Set a calender entry every month.
REM #
REM # Repair
REM #
REM # In case you have to repair:
REM #
REM # 1. Close Opera.
REM # 2. Delete existing files in "%APPDATA%\Opera Software\Opera Stable\Sessions" (or move them away).
REM # 3. Copy latest or one of the latest session and tabs files back to "%TEMP%\OperaSessionBackups".
REM # 4. Start Opera (you can start with this helper again).
REM #
REM ########################################
REM # Specify the session and session backup directory
set SessionPath=%APPDATA%\Opera Software\Opera Stable\Sessions
set SessionBackupPath=%TEMP%\OperaSessionBackups
REM # Backup the session directory
copy /Y "%SessionPath%\*.*" "%SessionBackupPath%"
REM # Start Opera
start "" "%ProgramFiles%\Opera\launcher.exe"
REM ########################################
REM # EOF
REM ########################################