Fixes#313
Change browser process detection from pgrep -f (full command line match)
to pgrep -x (exact process name match) to prevent false positives.
Microsoft Teams processes contain 'Microsoft' in their paths and may have
Chromium-based components, which was causing them to be incorrectly
identified as Microsoft Edge during clean operations.
Changes:
- Chrome detection: pgrep -f → pgrep -x
- Edge detection: pgrep -f → pgrep -x
- Edge updater detection: pgrep -f → pgrep -x
This approach is consistent with Firefox detection and prevents Apps like
Microsoft Teams, Microsoft Office, or other Microsoft products from
triggering false Edge detection.
All existing tests pass (9/9 in clean_browser_versions.bats).
cac2909093