I have sensitive eyes and need to be able to invert dark text on a white background in Firefox Ubuntu. So far I can't find a straightforward way to do this, and Firefox doesn't register the Ubuntu high contrast theme. Any thoughts?
Note that this extension only affects the contents of the web page. Depending on your gtk theme, the tabs and address bar may have dark text on a light background. To reverse that, simply click on the ☰ button at the right top corner of the browser and select Customize. In the Customize tab, click on Themes in the bottom row and choose Dark. Then click Done and now you'll have even the tabs and address bar with light text on a dark background as in the image above.
Try installing Dark Background and Light Text. This is what the current page looks like with the entension enabled:
Note that this extension only affects the contents of the web page. Depending on your gtk theme, the tabs and address bar may have dark text on a light background. To reverse that, simply click on the ☰ button at the right top corner of the browser and select Customize. In the Customize tab, click on Themes in the bottom row and choose Dark. Then click Done and now you'll have even the tabs and address bar with light text on a dark background as in the image above.