Last night or, early the following morning MST, the error was that was breaking the browser on 4.4.4 was addressed first seen in the beta version then, the standard channel release version. Many thanks to the Opera team and commentators of the forum that replied to this post.
If you root the phone or maybe with ADB Drivers, access the history and extract the images should be possible.
Take a look on XDA-Developers or Google.
From Opera itself I don't know if there is an option.
Windows 10 (x64) | Anniversary Update
Opera Stable · Beta · Developer
Test profile | Back up Linux · Mac · Win