theme_icons support in WXT or @wxt-dev/auto-icons

[kepi]

Feature Request

Firefox supports theme_icons field in browser_action (MV2) or action (MV3). It would be great to automatically discover (or generate with auto-icons) those.

It would be great to auto discover them i.e. in icon/16-light.png etc.

For auto-icons, IMHO best approach would be automatically check for icon/light.(png|svg) and icon/dark.(png|svg) and if present, generate proper sizes. Or little worse, activate it with with i.e. baseLightIconPath option.

What are the alternatives?

Simply define them manually via manifest.browser_action.theme_icons.

Additional context

documentation

[aklinker1]

I'm onboard adding this to WXT. Not a priority right now, would maybe get to this after v1.0 is released. Anyone else is free to contribute this though.

Here's some helpful links to get started:

• Auto-icons module: https://github.com/wxt-dev/wxt/tree/main/packages/auto-icons
• Where we discover the regular extension icons:

  wxt/packages/wxt/src/core/utils/manifest.ts

  Line 74 in c846a1f

  icons: discoverIcons(buildOutput),