Problem: If you are working with more accounts, there is no simple way to switch between your accounts without logging out and logging in with other credentials.
Proposed solution: Add an option to log in to more than one account at one moment. By clicking on your user name, you should be able to switch to another account. I think that this should be restricted to only few accounts (max. 5 [?]). The security aspects should be taken into concern.
Who would benefit: users with multiple accounts (bot accounts, test accounts, WMF/WMXY accounts, employee accounts...)
More comments: The actual workaround is to have more instances of the web browser (or more browsers, e.g. one account in G Chrome, other in Mozilla Firefox). I perceive the opportunity of switching the accounts as a standard feature in 2020s.
I personally have 3 accounts: my primary account for the majority of the Wikimedia work, the second one is a bot account – I use AWB for bot edits, but I also use the bots account in the web browser for the category-related tasks (Cat-a-lot); the 3rd account is dedicated to mass imports of files of the third parties to Commons. — Draceanetalkcontrib.19:55, 15 January 2022 (UTC)[reply]
Yes, please. Whe I have 2FA enabled and use my account on more devices, it is pain to login again. Current workaround is using different browser, but there are some browser specific (eg. Vivaldi tiled tabs) and I sometimes want to use specific browser with specific account. JAn Dudík (talk) 12:29, 17 January 2022 (UTC)[reply]
Neutral I have 2 accounts. Generally I work with 2 browsers open (Windows and Firefox) and I'm logged in with both browsers as different user. No problems. Taivo (talk) 20:09, 28 January 2022 (UTC)[reply]
Firefox Containers does exactly this. Just set up a container per account. The tabs are even colour coded, and you can open any link in a specific other container (the effect being to open that link as another account). Inductiveload (talk) 23:32, 28 January 2022 (UTC)[reply]
@Sdkb: I understand this concern; the tool might be restricted to trusted users only, or the user should make the switched accounts public (or the switch could be logged.) — Draceanetalkcontrib.18:03, 29 January 2022 (UTC)[reply]
Oppose For bot accounts, but there are concerns about sockpuppetry. Many vandals have a lot of accounts, and for Toolforge bots, they don't need to login much. Thingofme (talk) 01:41, 31 January 2022 (UTC)[reply]
Since I was pinged here to provide rationale, I agree with the issues presented around sockpuppetry plus the ways presented for legitimate users to get around this via multiple browsers etc. seems like the easier option than the large amount of developer time that would be spent on making this possible. Dreamy Jazztalk to me | enwiki02:08, 1 February 2022 (UTC)[reply]
Support It might be only for some group of users. It can be granted by admin, it can be only for eg. rollbackers etc.BUt yes, please JAn Dudík (talk) 20:56, 31 January 2022 (UTC)[reply]
Oppose It encourages sockpuppetry. It's not a problem to use multiple accounts with Chrome profiles or alternatively using an incognito window or multiple browsers. Grillofrances (talk) 05:51, 7 February 2022 (UTC)[reply]
Support Absolutely. More generally, Mediawiki should store data about linked accounts, to formalize acceptable "alternate accounts" and distinguish between them and prohibited sockpuppets. Yair rand (talk) 00:29, 11 February 2022 (UTC)[reply]