I use https://color.firefox.com/ to differentiate. It's a solid theming system that they built a few years ago, promoted for about a week and then never mentioned again. Probably because they'd rather promote their braindead self-destructing themes (sorry, 'Colorways drops'). - Source: Hacker News / 8 months ago

Or Save your Firefox Color theme as .XPI 1) Go to https://color.firefox.com/ 2) Click the Export icon at the top right 3) Click Next 4) Type in any name for your theme and click Next. 5) You can now save your Firefox Color theme as theme.xpi. If you want you can then submit it to the Firefox Add-ons Marketplace. Source: 12 months ago

I'm not entirely sure what you're trying to do, but have you tried Color? Https://color.firefox.com/. Source: over 1 year ago

Colorways was always going to be temporary I'm afraid. Not sure anyone saved the custom themes for it, but I recommend checking out https://color.firefox.com/ (which isn't going anywhere), setting up a theme (you can start from a preset), and saving it. Works like a charm. Source: over 1 year ago

You might be interested in https://color.firefox.com/. Source: over 1 year ago

Yeah I moved on pretty quick from browserstack, but it seems to be the most popular. I've tried crossbrowsertesting.com but at the moment I really like app.lambdatest.com. Source: over 1 year ago

Https://geizhals.de/ - this is a german site but the UI is nice and you can find a lot of stuff. Https://www.gsmarena.com/search.php3? - a phone search site. When I was at https://crossbrowsertesting.com we used this site a lot Https://www.howacarworks.com/ - how a car works Https://www.mcmaster.com/ - the UI here is so nice. Those illustrations Https://ciechanow.ski/mechanical-watch/ - how does a mechanical... - Source: dev.to / about 2 years ago

Fortunately we don’t need to install, nor configure, any other tools, unless maybe some fancy reporters, but for now we can get everything we need in terms of end-to-end automated testing out of Nightwatch. Besides Chrome, Nightwatch has built-in support for all major browsers, including Firefox, Edge, and Safari, all thanks to its integration with the W3C Webdriver API and Selenium. It also allows you to use... - Source: dev.to / over 2 years ago

Crossbrowsertesting.com - Manual, Visual, and Selenium Browser Testing in the cloud - free for Open Source. - Source: dev.to / almost 3 years ago

Professionally, I do basically the same for dev testing. We also have various devices on different platforms/versions in the office when needed, and our QA team primarily uses Cross Browser Testing Tool. If I need to check something specific, I usually use CBT. Source: about 3 years ago