Regarding https://forums.opera.com/post/56526 Opera developers are investigating this issue.

As the basic problem is in the source of Chrome / Chromium (developed by Google) this problem can be a tricky one to solve.

Update to my solution with Intel drivers: I've updated the management engine components to V8.1.0.1263 (on live system) and was able to start Opera normally.

I then uninstalled latest drivers and reinstalled the old ones and now this is driving me crazy as I am not able to reproduce the problem anymore, tested with several Opera development and last 3 stable versions... all are working fine.

Seems the Intel uninstallers have done something to filesystem and / or registry. I would not like to restore my system from my backup from beginning of last month.

I finally got Opera running without --no-sandbox parameter!

Cause seems to be a interdependency with the "Intel Management Engine Components" and / or "Intel Trusted Connect Service"

Can anyone verify / reproduce following procedure - I currently only did it within Sandboxie (http://www.sandboxie.com/) to avoid damaging my system:

1. Check if some specific plugins are installed and detected

Open https://bugs.opera.com/wizarddesktop

At the bottom of the page (where HTTP_USER_AGENT and more information is displayed) check if the following plugins are detected:

Intel Identity Protection Technology (Intel web components for Intel Identity Protection Technology) npIntelWebAPIIPT.dll
Intel Identity Protection Technology (Intel web components updater - Installs and updates the Intel web components) npIntelWebAPIUpdater.dll

Optional you can open a command line (Windows+R, then enter cmd.exe) and list your path variable with entering:

echo %path%

The output should contain a path like

C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files (x86)\Int el\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT

2. When one or both plugins are detected, close Opera and uninstall following software from your system

I added my exact version information in brackets. Maybe there is someone with other or even same versions and Opera is working fine with them.

• "Intel(R) Trusted Connect Service Client" (v1.22.216.0)
• "Intel(R) Management Engine Components" (v8.0.0.1262)

3. Restart Opera using --no-sandbox parameter and re-check https://bugs.opera.com/wizarddesktop if the plugins were successfully uninstalled

Optional, again check path variable within cmd.exe - all paths to C:\Program Files\Intel\Intel(R) Management Engine Components should be missing now.

4. Restart Opera without any additional command line options

If possible, please post your result here.

For missing bookmarks see https://forums.opera.com/topic/5694/bookmarks-from-opera-24

Currently they are saved in your Opera profile (Check "About Opera" menu entry and then profile path) in a file named "Bookmarks"

Had the very same problem with Opera Windows version.

Please check "Imported Bookmarks" in Opera 25 and check all folders. I cannot remember the exact name but is was something like root_usr or usr_root. Just drag-and-drop them into new bookmars.

Otherwise check folder "%APPDATA%\Opera Software\Opera Stable" - there is a file called "Bookmarks" (with no extension). You can open it with any text file viewer and extract your old bookmarks manually.

A bug from development versions has been taken over into Opera stable. As a workaround use --no-sandbox as startup parameter - be aware that this will affect security of the browser.

See following threads for more detailed instructions and information:

https://forums.opera.com/topic/4843/nothing-opens-on-25-0-1606-0

https://forums.opera.com/topic/5747/opera-25-stuck-on-loading

https://forums.opera.com/topic/5321/endless-tabs-loading-in-my-opera-developer-for-windows

FYI: This bug now affects stable version 25.0.1614.50 as well.

For me the problem was introduced with a specific version of development builds. After downgrading there were no problems.

--no-sandbox neither is a solution for me, at least not for a stable version.

I'm afraid this is a problem only Google can solve as Opera is mainly based on Chromium / Chrome, as well as the sandbox feature - when you google for 'chrome blank pages' it seems that this in not an uncommon bug.

I'm still mainly using Opera 12.17 (Mainly using integrated RSS reader keyboard control and sidebar with bookmarks) but in the future the problems with some sites will raise - Firefox does a good job with bookmars but there is no acceptable RSS reader for Firefox.

Maybe this workaround will help you: http://forums.opera.com/topic/4843/nothing-opens-on-25-0-1606-0

See http://forums.opera.com/topic/4843/nothing-opens-on-25-0-1606-0

Sadly this bug now has been introduced in Opera 25.0.1614.50 stable for me.