Update browser support docs for INP and LCP (#647)

* Update INP browser support docs to include Firefox 144+

* Updated outdated comment in `browserSUpportsEntry.js`

- The comment previously stated Firefox doesn't support `interactionId`, which is no longer accurate

* Add Safari Tech Preview support for INP and LCP

* Clarify browser support description in README

- Clarified browser support information for web-vitals metrics

---------

Co-authored-by: Barry Pollard <[email protected]>

Author: Mimori256

README.md

@@ -1129,14 +1129,12 @@ interface TTFBAttribution {
 
 The `web-vitals` code is tested in Chrome, Firefox, and Safari. In addition, all JavaScript features used in the code are part of ([Baseline Widely Available](https://web.dev/baseline)), and thus should run without error in all versions of these browsers released within the last 30 months.
 
-However, some of the APIs required to capture these metrics are currently only available in Chromium-based browsers (e.g. Chrome, Edge, Opera, Samsung Internet), which means in some browsers those metrics will not be reported.
-
-Browser support for each function is as follows:
+However, some of the APIs required to capture these metrics are currently only available in some browsers. Browser support for each function is as follows:
 
 - `onCLS()`: Chromium
 - `onFCP()`: Chromium, Firefox, Safari
-- `onINP()`: Chromium
-- `onLCP()`: Chromium, Firefox
+- `onINP()`: Chromium, Firefox, Safari Tech Preview
+- `onLCP()`: Chromium, Firefox, Safari Tech Preview
 - `onTTFB()`: Chromium, Firefox, Safari
 
 ## Limitations

test/utils/browserSupportsEntry.js

@@ -28,7 +28,6 @@ export function browserSupportsEntry(type) {
       return false;
     }
 
-    // Firefox supports the event timing API but not `interactionId`.
     if (
       type === 'event' &&
       self.PerformanceEventTiming &&