1764831 - Setting image source of FileReader result for large GIFs failing since Firefox 97

Status: RESOLVED WONTFIX

(Core :: Networking, defect)

Description

[Sean Voisen (:svoisen)]

Since Firefox 97, setting the image.src of the result of a FileReader.readAsDataURL seems to be failing for large GIF images. We are running into this issue in Adobe Creative Cloud Express in newer versions of Firefox.

For instance, using a very large GIF (28+ MB) at the following URLs fails:
Merge Videos: https://express.adobe.com/tools/merge-videos
Convert to MP4: https://express.adobe.com/tools/convert-to-mp4

Here is a jsfiddle for a reduced case: https://jsfiddle.net/gsto8caw/
We are using a GIF of size 28.5MB, where the above example fails.

Comment 1

[Kagami Rosylight [:saschanaz] (they/them)]

This is "regressed" by bug 1721448 but I think this is an intended change. Codes need to use blob URLs instead of data URLs to do this as described in https://bugzilla.mozilla.org/show_bug.cgi?id=1757387#c8. (It's shipped by bug 1741426, so the version number.)

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

Set release status flags based on info from the regressing bug 1721448

Comment 3

[BugBot [:suhaib / :marco/ :calixte]]

:valentin, since you are the author of the regressor, bug 1721448, could you take a look?
For more information, please visit auto_nag documentation.

Comment 4

[Sean Voisen (:svoisen)]

(In reply to Kagami :saschanaz from comment #1)

This is "regressed" by bug 1721448 but I think this is an intended change. Codes need to use blob URLs instead of data URLs to do this as described in https://bugzilla.mozilla.org/show_bug.cgi?id=1757387#c8. (It's shipped by bug 1741426, so the version number.)

Confirming that using blobs works for our team. Thanks for your quick response on this.