installation fails in Opera (Win)

[domnar]

Hello,

tried to install UBO-Extra on current Opera 58.0.3135.127 (Win) by loading the extension in Opera "Developer mode". But Opera behaves different from what "https://github.com/gorhill/uBO-Extra" suggests:

1. Attempting to load the zipped file throws:

Extension load error Failed to load extension Manifest file is missing or unreadable Could not load manifest.

2. If first unpacked, then loaded, it works, but extension gets lost as soon as browser gets restarted...

Others seem to have managed that, but posts are older, thus possibly version dependent? Is there anything i miss, or should that actually work? Would be great to also have this one on Opera... Any help highly appreciated!

[domnar]

Sorry, just realised i just created a duplicate (https://github.com/gorhill/uBO-Extra/issues/27) and gorhill already answered. Looks like "CHROME-EXTENSION" is the only option. Hoped putting the source code of the extension into the respective extension filesystem of Opera would be an option to obsolesce that...

Thanks for your quick reply, gorhill!

Best