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Upgrade your browser to use Dropbox
I tried to log in to the promotion 20GB Dropbox by Dell but I received this message once I clicked right button on the dropbox icon on my Windows 10, which is as follows:
Upgrade your browser to us...
I'm having the same problem. It started recently. I'm not a frequent user of dropbox so it is difficult to say when exactly it happened and after what. Approximately a month ago everything was fine. Since then I definitely updated Windows itself and Edge. I would guess that the error is triggered by an opposite, not because I have an old version of a browser but apparently I have a too new version.
I hope my reply will be reported to the development team. This is clearly a bug in the browser identification code when displaying authorization page (https://www.dropbox.com/1/oauth2/authorize). Apparently it is very recent change. I display this page with the help of UWP WebView control, which is essentially an Edge Browser. I don't know why but that control identifies itself as this "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; WebView/3.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36 Edge/18.19042" and it is different from the regular Edge Browser. Also, I don't know what deems to be wrong with this line but because of that "upgrade your browser to use dropbox" is displayed. The regular Edge Browser on my system sends this header "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Safari/537.36 Edg/89.0.774.54". If I use this header in the WebView control, the authorization page is displayed but something is not working anyway. It always gives an error "There is a problem completing this request" when I click on "Sign in" button or even when I pause typing an e-mail or password. I would guess a side effect of captcha.
Finally, I guess, I got everything and apparently it is not a bug in the browser identifying but frankly speaking I didn't expect Edge 18 to become unsupported. IE is understandable but not Edge 18. What I learned is that UWP WebView running Edge 18 browser even though I have Edg 89 installed on my system. I expected WebView to use the latest installed engine but it was not true. Thus, I would like to ask, to continue supporting Edge 18, without it all UWP apps using WebView for authorization with Dropbox will break. So far I don't see a way how to use Dropbox web authorization from UWP.
Because my main browsers are Chrome and firefox, I tried to log in this promotion dropbox once I removed the Edge on the control panel. But it is not still working.
I am experiencing the exact same issue with the Webview control in UWP, specifically in Xamarin developing in the UWP environment. Unless and until Microsoft can update the Webview control, Dropbox needs to continue supporting Edge 18 or there is no way to use the Dropbox API to authenticate a user to use Dropbox in our app any longer. There is no way, that I have found, to use the external browser in UWP to authorize a user and retrieve the token from the external browser. This is a breaking change that Dropbox has inflicted.
