Worked well until yesterday, and now polymer is back. Wretched YouTube.

works really well!

Zero stars! Complete crap! Not working at all:-( Null Sterne! Totaller Mist! Funktioniert nicht:-(

Works great!

Doesn't work. Hasn't been updated in nearly 3 years.

Not working anymore...

This is great and simple. I only don't give 5 starts because it would be handy an on/off option.

Currently works only on the YouTube home page. Would be most effective if it could also remove the "recommendations" and "latest" ribbons from the home page, as well as being extended to actual YouTube video pages as well as on search, history, and watch later pages.

This still works for me, I'm using Firefox mobile for Android.

First, visit a YouTube video. Second, "Request Desktop Mode". Third, copy the url. Fourth, uncheck "Request Desktop Mode" then paste the url. This is situational and will only work on that one video.

Fifth, click onto another video the new layout should be restored. Sixth, now select Youtube's desktop mode, you can get to this by pressing the three dots near the video.

You should now get the old layout back! Good luck! :)

doesn't work

no longer works.

Small and simple, speeds YouTube up a lot! Works great for me.

Yes it's still working for me too! Thank God, I hate Youtube's "modern" design.

Thanks alot mate for this simple but great addon. It no longer works but it was great while it did. ^^

working well thank u. just refresh once after clicking a video and thats it (so it adds the disable polymer to url) then it works. better than manually copy/pasting every video or watching logged out.

cause google is stupid and cant fix anything, even disabled adblock doesnt help.

Thank you for this addon!! YouTube (I'm using the U.S. site) seems to have been changed earlier today so that having your youtube.com PREF cookie contain "f6=8" no longer reverts to the pre-Polymer UI. I tried the addons Old Youtube Layout, Restore Old Fast Theme of YouTube, Switch for YouTube, YouTube Classic (the only one with a recent update), and this addon. Disable Polymer on YouTube is currently the only one of these addons that still successfully reverts the UI across the board, in my testing (YMMV).

It works by adding the parameter "disable_polymer=true" to all YouTube URLs. One of the competing addons works like that as well, but inconsistently, and apparently only on video URLs; the others no longer work properly at all (e.g. due to trying to manipulate the PREF cookie). Who knows how long this final method will last of getting the far superior old UI, but I'll continue to dig in my claws until utterly forced to use the functionally degraded "modern" interface.

It's interesting that a couple of other people report that this addon isn't working for them anymore as of yesterday. The current version was released in mid-2018, so an update can't explain my different results. I did start a fresh Firefox profile for unrelated reasons, so I didn't have any old youtube.com cookies lying around that might break the disable_polymer workaround. Those who are having trouble, first, please let us know which country's YouTube site you're using, as that may make a difference. Second, please try clearing all your youtube.com (and/or appropriate YouTube international site) cookies to see if that fixes it.

One thing that some people are complaining about is that the "show more" link for long Descriptions no longer shows up in the classic UI. This is YouTube's fault, not the fault of addons that revert to the pre-Polymer UI. Luckily, this can currently be easily fixed by adding a custom uBlock Origin filter rule to auto-expand the description:

youtube.com##div[id="watch-description-text"]:style(max-height:none !important)

See the reviews by CHAZZ and tanzie of the YouTube Classic addon for more details on that. Hopefully the author of one of the Polymer-reverting extensions will incorporate that transformation into their addon, so the extra step won't be necessary for long descriptions to be readable.

Unfortunately this stopped working as of today as Youtube made some changes to further deprecate the old UI. It's still possible to bring back the old interface by changing the PREF value in the yt cookie but users are presented with the message "This version of YouTube is going away soon"

This was a nice ride, but this is the end. It doesn't work anymore

not compatible with viewtube, therfore 1star.