**Feature summary**
> The PagedTiffHandler extension allows to upload and display tiff-files into your wiki. It can handle multi-paged images and render them into thumbnails on per page basis.
https://www.mediawiki.org/wiki/Extension:PagedTiffHandler
The focus here is that it can be used to display TIFF files, whether single page or multi-page. Otherwise, TIFF files can't be shown.
parent task: {T392080}
** Checklist **
[x] Passed discussion or already Wikimedia deployed
[x] Passed security review or already Wikimedia deployed
[ ] Voting CI structure tests
[ ] Runs MediaWiki-CodeSniffer
[ ] Runs phan
[ ] Supports MySQL, SQLite, and Postgres (if there are schema changes)
[x] GPL v2 or later compatible license
[ ] Extension's default configuration provides optimal experience
[ ] Tested with web installer
[ ] Any relevant dependencies also bundled