I've noticed that on several occasions now, I've had issues with downloading the older firmware even if I use the same format as the newer firmware links.
The newer link style modified with the end of the old link looks like the following:
New:
https://cdn.kobo.com/downloads/firmw...-3.19.5761.zip
Old:
http://download.kobobooks.com/firmwa...-3.19.5761.zip
Note the old link uses a http:// URL while the new style one uses a https:// URL.
I use wget from the command line with the following command line to perform the actual download since this automates the retries, using Firefox, I had to manually resume the download:
Code:
wget -c -t=0 https://cdn.kobo.com/downloads/firmwares/kobo4/january2016/kobo-update-3.19.5761.zip