This plugin works so-so. It is quite handy on many sites, but on others it fails miserably. Owl provides an option to self-disable on certain sites. Too bad that it does not comply! Especially if one backtracks onto a owl-disabled page, the experience is horrible: one is forced to re-switch owl off time and again.
In summary: very good & useful idea, but shaky implementation.
Room for improvement!

I think I testes all similar add-ons that are available for Firefox and this one is definitely the best in my opinion. You have one button for global activation/deactivation and a distinct button in the address bar for the current website. Sure, you don't have as many customization options as other add-ons, but if the default settings are appealing, you don't need to change them with numerous options.

I must be missing something as the website white list is not editable that I can see. So perhaps set up a tutorial or tell me how to enable this feature as I have some websites I don't want your extension working it's inversion magic on. Other than that nice little plugin here. Also the menu is not there when I click or right click on the own icon, I just get remove or customize, the usual menu bar configuration options you get for the bar itself but nothing for the plugin. Thanks!

Simplesmente incrível!

THE best dark mode addon for firefox. Please make it available for android too..

I've tried several "invert colors" add-ons, but this Owl addon seems to really work! I love it.

Works brilliantly. Love the dark UI this provides on GitHub

Interesting

Thanks for the update! I heavily use this extension. Definitely would suggest it to dark-theme fans and the shortcuts are nice

As of the time of writing this review, any page that is whitelisted and opened in a new tab (out of view), the whitelisting is ignored and the page is inverted...

Night Mode Pro extension does everything owl does, but better! So I changed...

not bad

Darkens all the colours, respecting the original ones, not inverting them. Thanks!

Owl is brilliant at rendering webpages with a dark theme.
I can only give three stars though as I'm experiencing massive slow downs in page loads for sites such as google.co.uk to the point where I nearly went back to Chrome thinking that Firefox Quantum was a bit buggy.
I noticed the slow down after the latest update to Firefox (59.0.1) but I'd also just added the google site to Owls list to darken.
Disabling Owl sped things up again as did removing Google from the list Owl darkens.
So I'm going to try using a mix of Owl and Stylish for making the web shady

Looks great on any well-designed page and my eyes hurt less. ;)
Great job! Thanks!

Owl is an eye-saver. It does an excellent job of making pages less tiring to look at.

One can only turn the brightness down so much. I am one who prefers dark backgrounds and themes in general because the white backgrounds with black text just burn the heck out of my eyes.

I have had no issues with this add-on/extension whatsoever and I have been using it for a long time.

I love owl. I am 70 and white is too bright for me anymore. The problem is with sites pop ups that pop up blocker does not block, whites out the screen so you have to turn off owl to turn off pop up window then re apply owl, which is a pain. popup blocker should work in tandem with owl. Am I missing something?

This extension is great but sadly it doesn't work on Firefox Nightly.