<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Work on this issue](https://contributors.gitlab.com/manage-issue?action=work&projectId=278964&issueIid=460291) - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=460291) </details> <!--IssueSummary end--> MR: Pending ## Description Let's create a `web_ide_cross_origin_extension_host` feature flag that we plan to just use for `.com`. Once https://gitlab.com/gitlab-org/gitlab/-/issues/460284 is merged we won't need to worry about this so much, but this feature flag will just be a failsafe if there's unknown blockers to that issues. ## Investigation - This might be an `ops` flag (If not, it might be a `derisk` one) - We want this scoped to a user - Here's where the feature flag is defined in the Web IDE https://gitlab.com/gitlab-org/gitlab-web-ide/-/blob/8b571e00a5f3b35666adf33798e3e6dca540f5d4/packages/web-ide-types/src/features.ts#L2 - We want a Rails FF that is pushed to the FE and given to the Web IDE config