[infra] Update firefox browser to 98.0.2
[infra] Update firefox browser to 98.0.2

The checked-in Firefox browser used for testing is updated from
version 67 to version 98.0.2

Bug: https://github.com/dart-lang/sdk/issues/48318
Change-Id: I78bfb404ad1203496e19df5b48102338b9800fc9
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/240720
Reviewed-by: Alexander Thomas <29642742b6693024c89de8232f2e2542cf7eedf7@google.com>
Commit-Queue: William Hesse <a821cddceae7dc400f272e3cb1a72f400f9fed6d@google.com>

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