Steps to replicate the issue (include links if applicable):

• Use Firefox on an Android phone in portrait orientation
• Visit a Phorge task which has an image embedded
• Click on the image comment
• Pinch with fingers to zoom

What happens?:

• Image stays zoomed out, which can be unreadable

What should have happened instead?:

• Image should zoom in

Other comments:

• In downstream I merged the one-liner https://gitlab.wikimedia.org/repos/phabricator/phabricator/-/merge_requests/71/diffs to fix this
• Current Phorge behavior "is against Web Content Accessibility Guidelines (WCAG)" per https://developer.mozilla.org/en-US/docs/Web/HTML/Viewport_meta_tag#user-scalable.
• Current Phorge behavior was introduced in https://we.phorge.it/rP953ab039acc0894e287304364920bc7cc4962cc0 which lists reasons, while I personally believe that allowing to zoom weighs more than those reasons. Filing this task to get opinions.