Add Firefox Sidebar support to the Side Panel Entrypoint

[ddushok]

Feature Request

WXT documentation suggests only Chrome Side Panel is supported. The same functionality exists in Firefox, but it is called Sidebar. Adding Firefox Sidebar Support to the existing Side Panel Entrypoint would allow devs to create cross browser extensions using the sidepanel/sidebar.

Is your feature request related to a bug?

"N/A"

What are the alternatives?

"N/A"

Additional context

"N/A"

[aklinker1]

Firefox recently made lots of changes around MV3, so I'll add this! Thanks for sharing

[aklinker1]

@ddushok After double checking, WXT already supports firefox sidepanels, the docs were wrong. They have been updated.

https://wxt.dev/entrypoints/sidepanel.html

Chrome MV2 is the only target that doesn't support sidepanels.