GitLab Support team member here. As a work-around, if you know the name of the existing branch you want to switch to, you can change the URL in your browser's

GitLab Support team member here. As a work-around, if you know the name of the existing branch you want to switch to, you can change the URL in your browser's location bar for the IDE. Here's the URL format: https://gitlab.com/-/ide/project/<namespace>/[<subgroup>/...]<project>/edit/<branch>/-/ This will re-load the IDE on the different branch. You can also switch branches in the GitLab UI's Files view, before launching the Web IDE with the "Web IDE" button (or the `.` shortcut). Also pressing "Web IDE" from an MR in GitLab will open that MR's branch in the Web IDE. So it depends upon your workflow currently, but I agree it will be nice to be able to swap within the IDE itself later (also when the GitLab Flow extension is added). The built-in git support in Code is already an improvement over the old Web IDE's Stage/Commit workflow, IMHO, and after the first load, the new Web IDE also loads faster than the old one, for me at least.