[waiting for v5] OpenPGP.js does not work on Firefox content script

[tomholub]

Originally posted by @tomholub in #2554 (comment)

---

Not sure if it's related or not, but with changes from this PR I'm facing another issue in Firefox only:

Message is either badly formatted or not compatible with FlowCrypt.
TypeError: openpgp is undefined

when trying to open any encrypted mail from myself. The issue is happening only in Firefox.

On Firefox, openpgp.js seems to be undefined in content script. I don't know why.

[tomholub]

Let's try again when OpenPGP.js has a v5 which has been restructured