617875 - Allow replaying of animated GIF if preferences are set to Play Once

Status: UNCONFIRMED

(Firefox :: General, enhancement)

Description

[Chas Belov]

User-Agent:       Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.12) Gecko/20101026 Firefox/3.6.12
Build Identifier: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.12) Gecko/20101026 Firefox/3.6.12

If end-user has chosen the preference to play animated GIFs only once, there is no way to replay the GIF without super-reloading the image or page.  It would be nice to have in the context menu an option to replay the GIF once (or else to start and stop loop play).  That is superior to reloading the page because:
1) Saves bandwidth.
2) If the GIF played jerkily on initial download, it can now be replayed smoothly.

Reproducible: Always

Steps to Reproduce:
1. Go to about:config
2. Type anim in the filter.
3. Set image.animation_mode to once
4. Download a page containing an animated GIF.
5. Watch it play once.
6. Wait until it stops.
7. Right click on the image.
Actual Results:  
Nothing in the context menu to allow replaying the GIF.

Expected Results:  
Item in the context menu to allow replaying the GIF.

Either:

Replay Once

where selecting the item plays the GIF once without re-downloading it

Or:

Loop image
Stop looping image

where Loop Image is gray if the image is looping, and loops the image if the image is not looping

where Stop Looping Image is gray if the image is looping, and loops the image if the image is not looping

Comment 1

[[:Aleksej]]

FWIW, a wontfixed SeaMonkey request with links to duplicates and a tracking bug: bug 69405.