@sewhelpme said in Unable to install chrome extension: CRX_FILE_NOT_READABLE:
Native HLS Playback
Tried this one. It installs fine for me in Opera 68.0.3618.125 64-bit on Windows 10 OS Version 1909 (Build 18363.836).
HLS is an extension used to stream videos.
Assumed that's what you meant, but without links to the extensions, I had to ask.
Using a Chrome extension with Slimjet (GetCRX), I can pack installers for extensions and themes from their Chrome pages. The extension installers so packed will install into Opera. Opera refuses to install the themes, however.