Enter about:config in the URL bar and check the pdfjs.renderInteractiveForms preference.

Requiring the editing of advanced settings hidden behind a warning to get a feature that is officially touted in the changelog and main page to work seems kind of… not right. ¬_¬

Requiring the editing of advanced settings hidden behind a warning to get a feature that is officially touted in the changelog and main page to work seems kind of… not right. ¬_¬

I assume the plan changed to a more gradual roll-out for some reason but the release notes didn't get updated to reflect that.

What steps to take to be able to fill out a form online.

What steps to take to be able to fill out a form online.

Is it a web form or a PDF form? Firefox shows a unique view and toolbar for PDFs, so that should help you tell the two apart.

To be able to fill a PDF, you need to modify the preference mentioned earlier in this thread. In case you are not familiar with the Advanced Config Editor, here's how:

(1) In a new tab, type or paste about:config in the address bar and press Enter/Return. Click the button accepting the risk.

(2) In the search box in the page, type or paste forms and pause while the list is filtered

(3) Scan down the list and double-click the pdfjs.renderInteractiveForms preference to switch the value from false to true

You might need to reload the PDF (click the button or Ctrl+r/Command+r) before this takes effect.

More info on about:config: Configuration Editor for Firefox.

If the problem is with a web form, could you describe the situation in more detail? For example, are fields missing, or you can't click in them, or they are not filling automatically? Actually, it would be better to start a new question if it's not a PDF form. Here's the link for that. As you progress through the form, scroll down past old threads to continue with your new question.

https://support.mozilla.org/questions/new