This is a big issue for me. Every stinking website thinks it's a good idea to use crappy inconsistent keyboard shortcuts, but don't have a way to turn them off.
I'm not sure what SPAs are or what Asana or Reviewable are, but I have happily used gmail with Pentadactyl by using passkeys. This is what I have in my passkeys setting for gmail:
'^https?://(mail|groups)\.google\.com':raNxujkopnczIU/#vl?<UP><DOWN>,gi,gt,gd,gl,
Also, is there a solid Chrome version of any of the above?