[kurthr]

Nitpick- Should this be, "leaving his role"? How about:

Chris Beard will be leaving his role as Mozilla CEO

[xparco]

Leaving has a negative connotation

[CydeWeys]

Does it? What alternative accurate wording would you suggest? Everything else I can think of is euphemism. Leaving a job is ... leaving a job. It doesn't say why.

[entropicdrifter]

Handing-off (to XYZ), stepping down from his role, retiring as CEO, etc.

I would say none of those are euphemisms, they just put the emphasis on the reason why as opposed to the act of leaving itself

[rwc]

When you leave, one has to be "left behind". It doesn't speak to an amicable outcome.

[jonathankoren]

Do you only leave the grocery store after a fight?

I think you’re reading much more into this.

[bronson]

You don't see a difference between leaving a leadership position and leaving a grocery store?

[lucb1e]

Well, either they are, or the PR department is reading too much into it and s/he's just explaining the reason why PR departments avoid it.

[rwc]

I think you're being naive to the way corporate communications work.

[jonathankoren]

Go home and spend time with your family.