PLEASE PLEASE PLEASE stop the goofy redesigning!!!!

[grk373]

Please revert the rounded corners to square and turn off the rainbow color scheme. The reason I switched from Chrome to Firefox is Google has too many interns roundifying and moving everything around every ten seconds, and now Mozilla is doing the same. A well-designed browser is like any other well-designed tool: simple, unintrusive, fades into the background when it's working at its best. I am begging that Mozilla spend their time on security updates and maintenance and not constant redesign. 

[Agentvirtuel]

Bonjour

Apparently, these similars discussions.

https://support.mozilla.org/en-US/questions/1608590
https://support.mozilla.org/en-US/questions/1608290
https://support.mozilla.org/en-US/questions/1608283
https://connect.mozilla.org/t5/discussions/feedback-on-the-new-ui-corner-rounding-dark-theme-and-win...
https://connect.mozilla.org/t5/discussions/why-my-lovely-dark-template-changed-to-purple/td-p/140204
https://support.mozilla.org/en-US/questions/1608917

[dftf]

To mostly-reverse the recent change:

Type about:config in the URL bar -> ENTER -> accept warning -> search for nova ->
double-click the line "browser.nova.enabled" to change it to "false"

Then, install the previous theme from here:

https://addons.mozilla.org/firefox/addon/firefox-proton/ 

[cage]

Boosting this, I was upset this couldn't be disabled in accessibility, I can't even see rainbows so its just a distracting mess my eyes cannot decode

[Seacat17]

Colorblind? I feel that; I have perception issues too 💔

[dftf]

For those with vision issues, first follow my other comment here to undo the new UI.

Then find all the official themes made by Mozilla here, to see if one would suit you better:
https://addons.mozilla.org/firefox/search/?promoted=line&type=statictheme 

If you don't find any that would suit you, install this add-on...
https://addons.mozilla.org/firefox/addon/firefox-color/

...then you can make your own theme on this site with whatever colours you like:
 https://color.firefox.com/ 

[MozillaUser1234]

Having the same issues, well said. Also trying to find a solution. As others pointed out, this is in the category of accessibility so it's got to be dealt with. Someone with the skillset please help those people.