As Dr Windows reports, the web app version of Skype launched back in 2019, and only worked on Chromium-based browsers. This includes Google’s Chrome and Microsoft’s own Edge browser. Support for Safari was only added in May this year. And soon, once version 8.78 of the web app rolls around, it will also finally support Mozilla Firefox. Source: Skype / WikimediaThat being said, there’s no word on when that will happen. It will likely not take too long, as said version is currently being tested by Insiders. Right now, you can still use the Skype web app on the Firefox browser, though you will be greeted with a warning that functionality will be limited. Skype for Web’s omission of Firefox support has always been odd, considering that it and the mobile version of Chrome are the only browsers that are still not supported. But at least that’s changing soon. (Source: Skype, Microsoft via Dr Windows)