[dataflow]

Have you tried MHTML?

[RiverCrochet]

SingleFile is way more convenient as it saves to a standard HTML file. The only thing I know that easily reads MHTML/.mht files is Internet Explorer.

[dataflow]

Chrome and Edge read them just fine? The format is actually the same as .eml AFAIK.

[RiverCrochet]

I remember having issues but it could be because the .mht's I had were so old I think I used Internet Explorer's Save As... function to generate them.

[dataflow]

I've had such issues with them in the past too, yeah. I never figured out the root cause. But in recent times I haven't had issues, for whatever that's worth. (I also haven't really tried to open many of the old files either.)