Which firmware for Sonoff Dongle-E router?

Do not confuse “Sonoff ZBDongle-P” with “Sonoff ZBDongle-E”! They are based of radio SoC(s)/MCU(s) from different manufacturers so you can not use the same firmware or flashing tools! If you want to flash a “Sonoff ZBDongle-P” then use firmware and tools for it, and the same goes for “Sonoff ZBDongle-E”. It does not matter what other devices you have, it is only the device that will be flashed that matters. So if you want to flash “Sonoff ZBDongle-E” as a Zigbee Router then you only need to concern yourself with it, regardless which Zigbee Coordinator you have. See these threads which have links to firmware (including link to Zigbee Router firmware for “Sonoff ZBDongle-E”) and if you have any further questions about flashing then post in the questions in those respective threads:

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