1818114 - Full page screenshot takes a compound screenshot of the current and previous page

Status: RESOLVED DUPLICATE of bug 1646063

(Firefox :: Screenshots, defect)

Description

[Ania]

STRs

1. Navigate to https://www.reddit.com/search?q=EPA%20Ohio&source=trending
2. Click the first post in the list - https://www.reddit.com/r/news/comments/1189khu/epa_demands_norfolk_southern_handle_all_cleanup/ (current first post for me)
3. Make a whole page screenshot of the page

Expected result

1. Screenshot of the current page up to 30k px in length is made.

Actual result

1. A screenshot of the visible area of the current page is combined with a screenshot
2. After the screenshot is downloaded, the browser then returns to the previous page (https://www.reddit.com/search?q=EPA%20Ohio&source=trending).

Comment 1

[Ania]

Attachment: Screenshot 2023-02-21 at 17-18-08 EPA demands Norfolk Southern handle all cleanup after the Ohio toxic train wreck and threatens consequences news.png

Comment 2

[Sam Foster [:sfoster] (he/him)]

Thanks for filing his Ania, I think this is the same underlying problem of another bug we have on file: reddit puts up the post in a position:fixed element that overlays the rest of the page. So when you capture the full page we get the visible viewport which is that fixed element, then everything below the fold.