Pressing ctrl+s doesn't bring up a save dialogue for the web page.
Allows you to add custom css to web pages on a per website basis every time you visit. You can use a GUI and edit the CSS directly.
Applies a dark mode to any web page. It can be turned off on a page by page basis, although it's not obvious that you have to click the website name in the UI to do this. I think it's very good at making pages still look right and is a vast improvement to most websites, sometimes out-doing the site's own dark mode.
Allows you to switch between YouTube comments and Reddit comments for any YouTube video. It gives you a choice of subreddits where the video has been posted.
Sometimes YouTube comments are cancerous, and sometimes Reddit comments are too, but it's nice to have the option.
Removes page clutter and allows you to read web pages in a clean, highly formatable format.
This is good in combination with Reader View. It flashes the words in order on screen so that you can read faster without the overhead of moving your eyes or head.
Replaces your new tab page with a customisable tab that includes a couple of adverts. You can donate the advertising money you generated to charities of your choice.
Injects scripts into web pages. You must specify the site and a URL for the script.
This is an extension that I made. It automatically saves your position in web comics and other web series. It relies on you stating the position of chapter and page numbers in the URL, so that when you visit a later chapter or page, the extension knows to update your position.
This extension has the same purpose as Comic Owl, but is probably preferable. When you click the icon it checks your bookmarks and updates the most similar one to the current URL with the current URL.
A cookie editing widget for the current page.