I use OAuth 2 browser authentication from the smartphone application.
Mastodon's browser authentication has the following problems.

• If I try to authenticate as User B after authenticating as User A, Mastodon automatically authenticates as User A.

• The user name is not displayed on the screen to approve / reject the application. I can not check whether this screen belongs to user A or user B.

• There is no "Log in with other account" link on the screen to approve / reject applications. When logging out as user A and then logging in and authenticating as user B, I had to edit the address bar of the browser and perform complicated operations.

• [x ] I searched or browsed the repo’s other issues to ensure this is not a duplicate.
• [x ] This bug happens on a v1.2.2