Similar to Apple, Kindle's software has always been proprietary... [I]f you buy a Kindle today, you have very little hope of actually being able to customize it without resorting to "breaking in" through hardware modification. Read more: https://u.fsf.org/3zi
@fsf #Kindle #paperwhite reminds me a bit of Microsoft's gadgets: excellent hardware, craptastic software.
At least with the tablet-based kindles you load something like the uber-customizable #FBreader
https://fbreader.org/