that isn't strictly speaking a gif. imgur (among other image/video/etc hosting) can do a lot of tricks. that ".gifv" at the end of the url makes it present the "gif" as a video (mp4, in this case).
If you change the url to end with just ".gif", then it'll show it as an actual gif
You can probably do it with Greasemonkey, have you tried that yet?
Are there any Greasemonkey scripts to add GIF playback controls?
When viewing a gif (say https://i.imgur.com/l53kRnm.gifv) you can right click it and select "Show Controls".
that isn't strictly speaking a gif. imgur (among other image/video/etc hosting) can do a lot of tricks. that ".gifv" at the end of the url makes it present the "gif" as a video (mp4, in this case).
If you change the url to end with just ".gif", then it'll show it as an actual gif
I had tried this on Reddit and it worked ... only to find out that it actually shows GIFs as videos, with URLs like this: https://preview.redd.it/ni50mhcst4eb1.gif?format=mp4&s=258d02a4fde68d53272c8d6a08f2ba648dfd2111. I tried it on this actual GIF but it's not available https://www.google.com/search?client=firefox-b-1-d&q=web+gif+example#vhid=YGtfdlLW95ObWM&vssid=l.
That's not a GIF, that's gifv, a format from Imgur to show videos as GIFs. It doesn't work when I try it on an actual GIF: https://www.google.com/search?client=firefox-b-1-d&q=web+gif+example#vhid=YGtfdlLW95ObWM&vssid=l.