bpo-35308: Fix regression where BROWSER env var is not respected. (GH-10693)


Regression introduced in e3ce695 and 25b804a, where the old parameter
update_tryorder to _synthesize was first ignored, then given the opposite
value in the attempt to fix bpo-31014.
(cherry picked from commit 8c281ed403fd915284d5bba2405d7c47f8195066)

Co-authored-by: Zhiming Wang <i@zhimingwang.org>
3 files changed