Over the last year or so, Overdrive has been sunsetting their clients and pushing people to use the Libby web app leaving folks with older mp3 players, people who do a lot of offline listening, and people who just don’t like the Libby interface without a way to listen. I wrote a Firefox extension that lets you download the mp3s just like the old desktop clients used to do and it even will optionally parse the chapters for you. Hope someone finds it useful!
https://github.com/bookbonobo/libby-download-extension
Very good extension, but it would be even better if you could make one for Chrome (and therefore for other chromium based browsers as well).
Firefox is not as widely used and this extension is also limited to the desktop FF browser because mobile Firefox can't install this extension.
On the other hand, a chromium extension would work on a variety of desktop chromium based browsers, most prominently Chrome and Edge. But it could also be installed on the two mobile chromium based browsers, KIWI and YANDEX for Android, both of which can install full desktop extensions from the Chrome WebStore.
Of note, LIBBY AUDIOBOOK EXPORTER is a very good, simple and fast Chrome extension that works in all the above platforms. But it creates multiple mp3 files instead of a single one, and the resulting book does not display chapters in as many players.
It's possible to install custom extensions on Firefox Android by making a collection.
Ok. I figured it out. I used collections to get this extension installed on both Firefox Beta and Firefox Nightly on Android. And the extension seems to work fine till it gets stuck on "downloading zip". All the files were processed and "completed" but it gets stalled at the actual zip.
Any ideas why this may be happening? I tried the same book on FF desktop on PC and it worked perfectly.