I'm working on a developing a browser extension which uses StackExchange API authentication. I was able to successfully implement the authentication for Microsoft edge/Chrome when I added chromiumapp.org as the OAuth Domain in the app settings & redirecturi = browser.identity.getRedirectURL('oauth2') as mentioned here.

But this doesn't work with Firefox since the domain chromiumapp.org is specific to chromium browsers. The domain for Firefox is allizom.org. And its not possible to add multiple domains to the StackApp in app settings.

1. So as suggested in the questions here & here, I tried adding stackexchange.com as the OAuth Domain in app settings & redirect_uri = https://stackexchange.com/oauth/login_success, but this create another issue (similar to this & this), where the OAuth screen gets stuck at the redirecturi webpage (below screenshot) which says "Authorizing Application" and doesn't return an access token

   I tried the same in a new instance of a browser which lets me login to using Google/GitHub OAuth, but even that returns to the same page an gets stuck there.

2. I'm also wondering if using the domain chromiumapp.org or allizom.org is secure at all! As mentioned in this answer, it sounds like a security concern.

Can anyone please help with solving this issue?

I'm working on a developing a browser extension which uses StackExchange API authentication. I was able to successfully implement the authentication for Microsoft edge/Chrome when I added chromiumapp.org as the OAuth Domain in the app settings & redirecturi = browser.identity.getRedirectURL('oauth2') as mentioned here.

But this doesn't work with Firefox since the domain chromiumapp.org is specific to chromium browsers. The domain for Firefox is allizom.org. And its not possible to add multiple domains to the StackApp in app settings.

1. So as suggested in the questions here & here, I tried adding stackexchange.com as the OAuth Domain in app settings & redirect_uri = https://stackexchange.com/oauth/login_success, but this create another issue (similar to this & this), 

   where, when the user clicks the login button, a new window is opened for the authorization which lets the user login to stack overflow. And once the login is successful, the window should automatically close. But the window gets redirected to the https://stackexchange.com/oauth/login_success which is the redirect_uri and gets stuck there. (below screenshot)

   I tried the same in a new instance of a browser which lets me login to using Google/GitHub OAuth, but even that returns to the same page an gets stuck there.

2. I'm also wondering if using the domain chromiumapp.org or allizom.org is secure at all! As mentioned in this answer, it sounds like a security concern.

Can anyone please help with solving this issue?

I'm working on a developing a browser extension which uses StackExchange API authentication. I was able to successfully implement the authentication for Microsoft edge/Chrome when I added chromiumapp.org as the OAuth Domain in the app settings & redirecturi = browser.identity.getRedirectURL('oauth2') as mentioned here.

But this doesn't work with Firefox since the domain chromiumapp.org is specific to chromium browsers. The domain for Firefox is allizom.org. And its not possible to add multiple domains to the StackApp in app settings.

So as suggested in the questions here & here, I tried adding stackexchange.com as the OAuth Domain in app settings & redirect_uri = https://stackexchange.com/oauth/login_success, but this create another issue (similar to this & this), where the OAuth screen gets stuck at the redirecturi webpage (below screenshot) which says "Authorizing Application" and doesn't return an access token

I tried the same in a new instance of a browser which lets me login to using Google/GitHub OAuth, but even that returns to the same page an gets stuck there.

Can anyone please help with solving this issue?

I'm working on a developing a browser extension which uses StackExchange API authentication. I was able to successfully implement the authentication for Microsoft edge/Chrome when I added chromiumapp.org as the OAuth Domain in the app settings & redirecturi = browser.identity.getRedirectURL('oauth2') as mentioned here.

But this doesn't work with Firefox since the domain chromiumapp.org is specific to chromium browsers. The domain for Firefox is allizom.org. And its not possible to add multiple domains to the StackApp in app settings.

1. So as suggested in the questions here & here, I tried adding stackexchange.com as the OAuth Domain in app settings & redirect_uri = https://stackexchange.com/oauth/login_success, but this create another issue (similar to this & this), where the OAuth screen gets stuck at the redirecturi webpage (below screenshot) which says "Authorizing Application" and doesn't return an access token

   I tried the same in a new instance of a browser which lets me login to using Google/GitHub OAuth, but even that returns to the same page an gets stuck there.

2. I'm also wondering if using the domain chromiumapp.org or allizom.org is secure at all! As mentioned in this answer, it sounds like a security concern.

Can anyone please help with solving this issue?