Pale Moon forum

This relates to responding in this board. Click to preview, click the image one inserted, to preview that. Click the back button and get a 'document expired' page. None of the previous pages restore the response. Is this a shortcoming of the Board software, the browser, or something obvious I'm missing here?

I'm guessing it's because of the text box. What is in the text box is not really part of the webpage, so that would explain the Document Expired message.
BTW, I tested it and I got that message also.

Yeah. You'd think wanting to preview an inserted image would be fairly standard!

You can middle-click the image so you can preview it in a new tab, while keeping your draft message current in its original tab.

It's because you're on an https page, and you're moving away from the reply page by viewing the image. The secure pages are not cached, so pressing the back button in your browser will have it try to recall something that has expired.

It's not necessarily a problem with the browser or the board software, it's inherent to using a board over https with no-cache, and the preview of the image not being in the same page. Middle-clicking or control-clicking would indeed be a solution.