It does the job well about 98% of the time. The few times it has issues are with websites that already have built-in "dark modes," but you can easily have the add-on remember not to enable on those sites by clicking its button in the toolbar. It does affect load times of websites, but not by a very significant margin. Sometimes UI elements on certain websites become obscured but can be easily fixed by turning off the add-on for that website.

Overall, the add-on does exactly what it needs to do, with near perfect execution. It's an essential add-on for me now along with uBlock Origin.

I am giving only 4 stars although this extension is very usefull and user friendly from my experience for 3 years, i had no problem with it.The reason why i give 4 stars, it drains net, i have a slow network if we use so many tabs they shows like that this extension make tap to close. So no other problems,,, i prefred to my friends also...
Thank You...

Normally, I use light theme.
When using the Dark Reader, it is correct that everything is dark.

But when off using the Dark Reader, my theme is still dark, although should return to light theme as before.

I really like the add-on, it does exactly what it says it does, and does it very well. It gives sufficient controls to configure, and selectively customise or disable the add-on on specific websites.

That said, I disabled it today after trying it for almost 4 months. Sometimes it slows down webpages too much, specially long pages (e.g. Github's webhook payload docs page), pages with visualisations (plots and figures, e.g. the coronavirus monitoring page by worldometers), and sometimes login pages.

I also have a hunch it's causing the memory footprint of my FF instance to bloat. I have a really beefy laptop (>13 gigs of RAM available), and it still starts paging after half a day. I do have a lot of tabs open, but I didn't have this issue before. If I continue to have my RAM issues after disabling the add-on, I'll come back and remove this paragraph.

Edit: now I have been running with the add-on disabled for half a day, with the same set of tabs, and my memory footprint is about 1/3-1/4 as before. Really sad that I can't use this add-on, back to being blinded on the Interwebs :(

Dark Reader works beautifully on Android, however I need to manually turn it on instead of relying on Auto button. My phone turns on dark theme at night and other apps do follow except for this one. I'm not quite sure if I'm missing something.

Расширение прекрасное, но браузер стал работать в 10 раз медленнее, поэтому только 4 звезды

only thing is that is will slow down ur computer but not to much

Major eye-saver, 5 star add on except the performance hit on Gmail. Work around by adding mail.google.com to the exception list.

does not work for me in aws console

This addon is one of the few that I use, and I am so glad for its continued existence and maintenance. Thank you!

On the flip side, it has terrible performance repercussions on page load times. Not sure if devs could spend time optimizing it, or if it's well optimized and is just a result of doing a ton of work to successfully change each page on the fly. The end result is that it makes everything feel like going back to an HDD computer after using an SSD for years.

A pleasure to my eyes. Could do a better job of detecting existing dark themes. Would be nice if Dark Reader would automatically disable itself on pages where Stylus is active.

Seems great, but I would prefer if there was an option to only be "opt-in", i.e., no darkening unless I explicitly add a website to the list. TIA!

Works very well overall. What would make it a 5-star review would be if it didn't slow loading webpages. Otherwise I have no real complaint. By far the most user-friendly, while still customizable.

This is the best dark mode extension i've but im experiencing an issue where my firefox home page gets inverted to white, even though i have the firefox dark theme enabled. Pls look into this.

Cool beans

UPDATE: 24-nov 2020: now even salesforce is get properly dark 🌘💪😀
Thanks, still the best "darkning" tool 🤟👍
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UPDATE on my review 11-may 2020:
Since last update of the Add-On, all works well again 👍😃
Thank You!!
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Since last update of 24-apr 2020, the add-no no longer works properly on FaceBook. FB default images ( e.g. Like or Shortcuts to Messenger ) don't show up any-more???
24-apr 2020 - 15:12
Also other sites have similar problems, looks like "radio-buttons" don't work any-more. The radio-button options are not showing???