[Due for payment 2026-05-29] seguiemj.ttf preloaded for all users despite only being used on Windows

[Julesssss]

Proposal here.

Problem

seguiemj.ttf (1.4 MB Windows Segoe UI Emoji fallback) is included in the webpack
preload whitelist, causing every user on every cold start to download 1.4 MB that
only Windows needs. Critical-path font bytes are ~2.7 MB as a result.

Solution

Remove seguiemj.ttf from the preload whitelist (keep the @font-face declaration so
Windows users still get it lazily). Inline the two critical Expensify Neue @font-face
declarations in index.html so the browser starts fetching them during HTML parse
rather than waiting for fonts.css. Expected result: critical-path font bytes drop
from ~2.7 MB to ~1.3 MB (−52%).

Issue Owner

Current Issue Owner: @rinej

[melvin-bot]

Reviewing label has been removed, please complete the "BugZero Checklist".

[melvin-bot]

The solution for this issue has been 🚀 deployed to production 🚀 in version 9.3.79-4 and is now subject to a 7-day regression period 📆. Here is the list of pull requests that resolve this issue:

• Perf web windows fonts improv #90773

If no regressions arise, payment will be issued on 2026-05-29. 🎊

For reference, here are some details about the assignees on this issue:

• @rinej does not require payment (Contractor)

[Julesssss]

On prod, closing