Inverts the page colors as a page action.

It inserts a <style> element into the <head> of the page. It uses filter: invert() to invert the colors.

If the <style> element already exists, it is removed instead.

Note that the scripts in package.json must cd into src before running web-ext. Otherwise it complains about ES6 modules not being supported.

To build using web-ext, run:

pnpm we:build

To run in Firefox Developer Edition, run:

pnpm run we:run

With the web extension Adaptive Tab Bar Color, use the websites:

• Light: Wikipedia
• Dark: Extension Workshop

• The page action will not run a second time. If running the extension via scripts, re-saving a file will fix it once.