If a browser supports the crypto API, OpenPGP.js will use it to generate RSA keys.
However, If a browser does not support crypto API, OpenPGP.js implements a JS-based RSA algoritm for the keys (starting line 12526 of https://unpkg.com/browse/openpgp@5.0.1/dist/openpgp.js). The algorithm has a statement do {...} while (n.bitLength() !== bits);. Even if n has same number of bits as bits, n.bitLength() returns an integer while bits (set by proc module) is a string, so the loop never ends. As a result, the /proc/generate-keys freezes with high CPU usage.
In my case, this happens both in Chrome and Firefox, under Ubuntu 22.04 (probably because the OS is missing some crypto library that the browsers use).
Try to generate keys on a browser without crypto API (i.e. window.crypto.subtle is undefined). If your browser and OS supports it, you can fake it by running window.crypto = {} in DevTools's Console.
Convert procKeySize from string to number.
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Fixed
10.1
Documentation
Issue #3469524 by abautu, rodrigo panchiniak fernandes: Browser without...
Automatically closed - issue fixed for 2 weeks with no activity.