Chromium/Firefox known issues/differences

[kazcfz]

Multiple files

Chromium can read multiple files from the clipboard in any event.
Firefox reads only 1 file in paste events. Drag and drop remains compatible. (See Bug 864052)

Copying GIF from the web

Copying animated GIF images from Chrome results in a static image.
Copying from Firefox allows previewing and attaching the animated GIF.

[unia909]

This extension doesn't work on the website I'm using. I can't tell the address, but it's due to a glitchy iframe handling. It shows error in content.js:172 document.getElementsByClassName(...)[0] is undefined

[kazcfz]

@unia909 Does the iframe happen to have sandbox attributes? Perhaps with allow-same-origin value too?
Some webpages also seem to 'recreate' their iframes, since the original iframe element's no longer in the DOM.

[unia909]

@kazcfz iframe does not have sandbox attribute nor allow-same-origin. But it has the seamless attribute. Maybe this creates script conflicts. Website seems to recreate iframes bc I can't find iframe that code is requesting