[Feature]: Align characters in Text Layer with canvas

[sox8502]

Is the feature relevant to the Firefox PDF Viewer?

Yes

Feature description

Text from the text layer isn't aligned with the text in the canvas layer (image attached below). It would be great if this could be aligned to make text selection more precise. I'm wondering if there is any low hanging fruit like tweaking CSS styling that would fix this.

Other PDF viewers

No response

[Snuffleupagus]

If you check text-selection then there's unfortunately existing issues already about the textLayer being slightly "off" from the actual rendering, which is somewhat expected since we (currently) cannot use the same font for both rendering and text-selection (and thus use a fallback font in the textLayer).

Fixing this really isn't trivial, however there's work in progress (I don't know the current state of it) to attempt to use the actual font in the textLayer which would address many of these issues.
Hence closing this one, since the general problem is already being tracked in other issues.