MComix is designed to handle comic books, western comics and manga/manhwa reading style. MComix reads most common image formats like JPG, PNG and support a variety of container / compression format like…
Besides ZIP compression format, other format that usually used are 7z/7zip and rar. As they are not installed by default in Pop!_OS, we have to install manually.
On my old laptop, a Lenove IdeaPad identified as Intel Core i7-3632QM processor, Intel Ivybridge Mobile graphics by Pop!_OS, the brightness is not set.