Affected versions

• Fx77.0a1

Affected platforms

• Windows

Steps to reproduce

1. Launch the stub installer.
2. Use ctrl+mouse wheel to zoom in/zoom out.

Expected result

• Nothing should happen.

Actual result

• The content of the stub installer window zooms in and out.

Additional notes

• This occurs for all the stub installer windows (install, reinstall, update).

Thanks for noticing this, I thought I'd checked zooming but apparently not.

I haven't found a mechanism to restrict this in CSS or HTML that works on a desktop browser (except zoom: reset, which is Webkit-only). It should be possible, in JS, to intercept scroll and key events that would zoom, but I'd rather avoid that. There is a OLECMDID_OPTICAL_GETZOOMRANGE OLE command to get the zoom range, but I haven't been able to find anything that sets it, and repeatedly forcing the zoom via OLE doesn't seem like a good idea, either (when to do it?).

While I restricted the ability to drag the image with JS (bug 1632499), I think that was more likely to come up accidentally. Arguably the ability to zoom is a feature, so I don't think we should go to lengths to defeat it.