Linux


Virtualization (VirtualBox)

How to install VirtualBox Guest Additions in a Lubuntu virtual machine


Photos

How to make part of a picture blurry

How to optimize images for your website (reduce file size)


Web browsers

How to make Google Chrome use google.com as default search engine

How to enable dark mode in Firefox


Other

Failed to run Redshift: Trying location provider `geoclue2'... (solutions)