feat: Remove FID

[ptang-nr]

First Input Delay (FID) has been deprecated and replaced by Interaction To Next Paint (INP). PageViewTiming events for first interactions are preserved by detecting the first first-input event and will no longer output value for the firstInputDelay and loadState attributes. For more info on PageViewTiming, see https://docs.newrelic.com/docs/browser/new-relic-browser/page-load-timing-resources/pageviewtiming-async-or-dynamic-page-details/. For more info on INP and the FID deprecation, see https://web.dev/articles/inp.

Overview

In this PR, we are proceeding with the removal of FID related logic from the browser agent.

Notes:

• The firstInteraction timing event should continue to be detected as-is, with the exception of no longer collecting or generating values for firstInputDelay and loadState attributes. Supported in Chrome, Edge, Firefox and Android. Not supported on Safari and iOS (see PerformanceEventTming browser compatibility)

Related Issue(s)

https://new-relic.atlassian.net/browse/NR-355558

Testing

Updated existing tests that dealt with FID.
Added unit tests for first interaction.
Manually tested

• Detection of first input on Chrome
• No first input detected when page is opened in background on Chrome

[github-actions]

Asset Size Report

Merging this pull request will result in the following asset size changes:

Agent	Asset	Previous Size	New Size	Diff
lite	loader	29.77 kB / 10.79 kB (gzip)	29.77 kB / 10.79 kB (gzip)	0% / -0.04% (gzip)
lite	async-chunk	52.59 kB / 17.08 kB (gzip)	51.25 kB / 16.71 kB (gzip)	-2.56% / -2.15% (gzip)
pro	loader	51.46 kB / 17.77 kB (gzip)	51.46 kB / 17.77 kB (gzip)	0% / 0.01% (gzip)
pro	async-chunk	99.77 kB / 30.52 kB (gzip)	98.29 kB / 30.11 kB (gzip)	-1.49% / -1.33% (gzip)
spa	loader	59.08 kB / 20.09 kB (gzip)	59.08 kB / 20.09 kB (gzip)	0% / 0% (gzip)
spa	async-chunk	114.49 kB / 34.85 kB (gzip)	113 kB / 34.45 kB (gzip)	-1.29% / -1.15% (gzip)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.66%. Comparing base (45cb413) to head (ca6926d).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1319      +/-   ##
==========================================
- Coverage   88.70%   88.66%   -0.05%     
==========================================
  Files         170      171       +1     
  Lines        7331     7340       +9     
  Branches     1488     1487       -1     
==========================================
+ Hits         6503     6508       +5     
  Misses        716      716              
- Partials      112      116       +4     

Flag	Coverage Δ
unit-tests	79.95% <100.00%> (+0.01%)	⬆️

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[github-actions]

Last ran on January 17, 2025 14:09:13 CST
Checking merge of (0e8aac2) into main (e7e0114)