The most recent firmware version for the Kindle Touch that you have is 5.3.7.3
If you read the title of this thread, you will see that 5.3.7.3 falls into the range that can be jail broken with the method described in the first post of this thread.
Follow all of Amazon's directions (you will find them again on your device model's page) to update to 5.3.7.3.
If it bricks along the way, use Kubrick.
Once you get to 5.3.7.3, follow the jailbreak instructions here (open the spoilers in the first post and read those also).
Once you open and read the first spoiler, you will know that it does not matter how many times you install the jailbreak.
It can always be installed, even if it is already installed, it does no harm to install it again.
KUAL is described in its own thread.
It is a sticky thread.
At the time I post this, it is at the very top of the top (sticky) part of the index page.
Read the title.
What the acronym KUAL stands for should answer your own question.
Do you need ssh or telnet access to your Kindle?
The USBNetworking is not required for anything else to work - except for the features that it provides.
That is: None of the other add-ins require it.
So it is up to you to decide if you need it.
The 'bridge' code
ONLY bridges the device jail break (and itself) across Amazon updates.
But there are no Amazon updates beyond 5.3.7.3 - when you get there, no other newer firmware exists.
But other than what is 'bridged' across the update, if it seems broke, re-install it.
= = = =
ONCE YOU REACH 5.3.7.3 THERE IS NOTHING THE KINDLE CAN UPDATE TO.
So stop worrying about what an update might do to the add-ins you install to 5.3.7.3, there is no update that can be done.
That is like worrying about leaving a jug of water outdoors tonight, when sometime in the next million years we might have another ice age.
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