Sort files by extension in file explorer

It sounds like you need to meet to DoubleCommander

It have:

• Sorting the files by their extension (highest priority)
• Showing the whole address in the address line (rather than only those 'blocks' starting at the home directory)

Alternatively you can display the name with the extension and the extension column

Also you can change the fonts in the config

You can add a hot key to edit the path or, from the first row, press F2.

I'm happily using Krusader for some time now. It should be able to do what you want, certainly allows sorting by extension.

You mean like this? The blocks you mentioned are called "breadcrumbs" (I don't know why) but you can get rid of it by clicking on the button I encircled in red in the picture below, to the left of the word "Location".

On the command line it could be done with

ls --sort=extention

or

ls -1 --sort=extension