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KOReader reflows pdf's for ereaders using k2pdfopt, see https://www.willus.com/k2pdfopt/

Kindles need to be jailbroken to use koreader, and Amazon apparantly makes that harder with each device :-/

I have this as a right-click action for files matching *.pdf in my file browser (thunar):

    k2pdfopt -ui- -dev kp3 %F
So if I right-click on a pdf I can immediately reflow it into a kindle-readable version.

(%F is the quoted file name, in your terminal you would `k2pdfopt -ui- -dev kp3 'something.pdf'`)



> Amazon apparantly makes that harder with each device

Alternative phrasing: Amazon is continuing to fix security bugs in Kindle device.


What threat is the security for?


The technical detail about latest WatchThis hasn't been published yet, but the previous KindleBrake seems to be using malicious JXR image payload via built-in browser. That sounds like pretty serious security flaw to me.




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