Blank Page (?)
First time I load a page embedding it? Blank.
First time I visit it directly? Blank.
Disable filter HTML? Blank.
Disable addon entirely on this page? It works!
Then ... re-enable addon? It works!
Re-enable filter HTML? It works!
What happened, there?
Same exact behavior on the second link even after getting it to work in its own tab. Interesting.
Thanks for reporting. The browser may have cached the framework for the diagram. But I also found a typo for Chart.js. In my test the page and the diagram is now loaded.
Deleting a branch is permanent. It CANNOT be undone. Continue?