Comment 8 for bug 1652340

It's possible, I remember having looked up one file's dimensions in the dialog.
I didn't scroll up the whole console output, so this will be something to look for next time.

(just tested - it was still at least 3 times faster now than before, but noticeably slower than without having the dialog opened in the session. Anyway, it's unrelated to this specific extension, which seems to work quite well already. But it's good to know, in case a question about this pops up somewhere, and in case I get impatient ;-), so thank you, again!)