Quite a late response, but based on our testing, it will not work. We tried a Cisco QSFP-H40G-CU1M and while the 3260 recognized the module, link would never come up. Replacing with a 7M active copper cable worked. We are hoping that a 1M Active Optic cable will work. (Cisco QSFP-H40G-AOC1M)
Edit: fixed typo, the firewall is a PA-3260
The short answer would be "Yes".
As OtakarKlier mentioned, QSFP-40G-SR-BD SFPs are compatible with PA- devices and will be visible in the "show system" CLI command, as CISCO-AVAGO. The 1Gbps Cisco SFPs, however, might be seen as CISCO-FINISAR.
I hope this helps.
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