<!--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> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=428012) </details> <!--IssueSummary end--> ### Summary The [``.avif``](https://en.wikipedia.org/wiki/AVIF) file extension is currently not recognized as image format/container ### Steps to reproduce * Upload an AVIF file ### Example Project https://gitlab.com/AB-xdev/avif-demo ### What is the current *bug* behavior? * AVIF files are handled like a blob * Files are not displayed in markdown as a HTML page is returned for the file ### What is the expected *correct* behavior? * AVIF files should be handled like images (e.g. png or gif) * AVIF are correctly displayed like e.g. on [GitHub](https://github.com/AB-xdev/avif-demo) or inside VS Code's Markdown preview ### Relevant logs and/or screenshots <details><summary>Click to expand</summary>   For comparison when using e.g. VS Code AVIFs are displayed correctly inside markdown:  </details> ### Output of checks This bug happens on GitLab.com and self-hosted instances.