i don't have an ultrawide monitor, but since every video now has some other aspect ratio than the regular 16:9 monitors, this extension is a must.

thank you and good job!

I had to downgrade to Version 3.3.4 because the Addon doesn't work on some sites it used to work with. Example 1: "heute.de" (reroutes to zdf.de) videos show a black screen, when viewed in fullscreen mode. Example 2: I sometimes watch videos via the Plex Web App and since the newest version the Addon doesn't seem to register the player anymore and stays in 16:9 in fullscreen mode.
Both sites work fine with the downgraded version.

EDIT: regarding Plex. I just tried it again, even deactivated all other firefox extensions except UltraWideo and when I use the Plex Webb App Player with Version 3.4.3 and load up a Movie or Series from my server, going fullscreen only shows the video in 16:9 with black bars on the side.
Doing the same thing with version 3.3.4 and it works as intended and stretches it horizontaly, so no more black bars. Not sure what else I can do to help in this regard.

It worked for me. Thanks.

a good portion of the video on the top and bottom is gone due to the zoom of this extension. It does go fullscreen but you lose video as a result.

If you don't mind that, it works! otherwise I'd like to see the whole video and it doesn't work well enough.

Perfectly Work on Jio hotstar.

ti amo, estensione migliore al mondo per monitor ultra wide

Works perfectly with my 4:3

Wonderful addon for those of us with a secondary or primary CRT monitor, since a lot of people forget to encode youtube uploads in 4:3 even if they contain no data outside that resolution.

My only request would be to allow it on a per-tab basis or restrict it to certain aspect ratios, since my primary monitor is ultrawide and I'd have to disable it manually every time I wanted to switch monitors. It looks like that's a work in progress for the pro version, but I'm not sure. Excellent addon nonetheless. It works instantly and flawlessly.

Ive been using Ultrawidify for long, but it has major performance issues with 4k 60fps ultrawide (on very powerful hardware you will have 1% frame drops with it enabled). This extension is far slicker, lower footprint, does not cause ANY issues with the same footage, and it offers a very convenient way of adapting a quite troubled aspect ratio of superultrawide 5120x1440 32:9 to the needs of the user. It must be said that 5120x1440 32:9 is basically a failed concept of aspect ratio implementation on a monitor that is supposed to play content NOT natively made in that same format. It will NEVER work properly fullscreen without cropping or distortion. This resolution should have received a 32:10 monitor solution. Sadly cheaping out on the panel size made it a sad affair for scaling video content. The solution for me is to set X to 0:9 and Y 1.3 in stretch mode.This will have small horizontal black bars but they are a acceptable trade off , minimal cropping the content,and have a natural viewing experience with no distortion.
Alternatively setting it to NORMAL with X at 1.9 and Y at 1 will not crop anything, while having minimal black bars vertically.

Conclusion. No software solution can provide the perfect 32:9 5120x1440 experience. It is inherently a unbypassable hardware problem to display content not natively provided in that format. A video game that offers the resolution settings does this. A video not recorded in that same format can not, no upscaling or stretching can remedy this to perfection.


What i do not like is the paywall for pro features, at least name a price and the added functionality in your UI.

Thank you for this extension! I can watch full screen on my 4:3 TV

Works perfect on YT 21:9, Thank you!

works great

very wonderful add-ons thanks so much

Works fine but begs for a review every time you update with no way to disable it.