Comment 4 for bug 2029521

Note: I found how to run the Viewer in debug mode, and noted this error for a bookmark that couldn't be found:

```
Failed to parse CFI: 'epubcfi(/472/2/4/2/6@49.10:58.26)'
```

Weirdly, though, bookmarks added in debug mode worked! And now when I launch the book viewer normally, they are still working. So I guess this is resolved, though I'm not sure how.

I will re-open, or re-file, if the problem reoccurs.