Hide the sidebars on Reddit, Wikipedia, FB and Youtube to save screen-estate. Toggle by clicking on Icon or Command/Ctrl+Shift+E
Clear the arbitrary spaces in pages that are constantly open on your screen. Currently only on pages:
I can add more sites on demand.
Note: Because wikipedia pages can be hosted on sites other than wikipedia.org the permissions require you to allow for all pages. I dont do anything other than remove some css elements and this can be seen on the extension code https://github.com/sinanm89/Wiki-NavBar-Toggle