The browser extension is for download to your PC, one direction only.
It drops block images into the last folder where you told AI2 to download something, for example an .aia export.
It does not do anything for loading blocks images into the Ai2 blocks editor.
Its Find facility is handy too.
Other browser extensions for AI2 are collected at
Regarding your OneNote storage scheme, it looks like you got to store commentary with the blocks images, and the storage facility does not try to compress the images and lose the internals that support re-entry into the Blocks Editor.
I have tried embedding downloaded Blocks Images in Google Docs as in Angry Balls V3 Documentation - Google Docs
but the blocks images lose content inside Google Docs (though they can be organized logically in sections accessible in a Table of Contents.)
Github can store blocks images too, without breaking them ...
Recently, I find that publishing a project as a series of posts on this board affords me several advantages ...
- Hideable sections of text
- bookmarkable titles in bookmarkable posts
- free cross language translation for the text
- blocks images are draggable into the Blocks Editor
- MIT's dime pays for the online storage and access.
- open access to the AI2 community
example: Wordle In A Day