Firefox on Android sucks. I make a Google search, images show up in the results. I click an image and it doesn't open up, just freezes the browser until I click the back button.
Is that a Firefox issue or Google making proprietary standards that only work with chromium based browsers?
I think Google is trying to be anti competitive. I have noticed similar issues when using Firefox with Google Docs.
Take a look at what a former Mozilla exec had to say on the issue: https://www.zdnet.com/article/former-mozilla-exec-google-has-sabotaged-firefox-for-years/
Do you have the Addon "Google Search Fixer" installed which shall give you the Chrome Experience in FF? just disable it. Image links will start to work again.