chore: remove Firefox < 80 auto garbage collection

packages/driver/src/cypress.js

@@ -14,7 +14,6 @@ const $Commands = require('./cypress/commands')
 const $Cookies = require('./cypress/cookies')
 const $Cy = require('./cypress/cy')
 const $Events = require('./cypress/events')
-const $FirefoxForcedGc = require('./util/firefox_forced_gc')
 const $Keyboard = require('./cy/keyboard')
 const $SetterGetter = require('./cypress/setter_getter')
 const $Log = require('./cypress/log')
@@ -137,7 +136,6 @@ class $Cypress {
     this.originalConfig = _.cloneDeep(config)
     this.config = $SetterGetter.create(config)
     this.env = $SetterGetter.create(env)
-    this.getFirefoxGcInterval = $FirefoxForcedGc.createIntervalGetter(this)
     this.getTestRetries = function () {
       const testRetries = this.config('retries')
 
@@ -213,8 +211,6 @@ class $Cypress {
 
     this.events.proxyTo(this.cy)
 
-    $FirefoxForcedGc.install(this)
-
     $scriptUtils.runScripts(specWindow, scripts)
     .catch((error) => {
       this.runner.onSpecError('error')({ error })

packages/launcher/lib/detect.ts

@@ -133,21 +133,9 @@ function checkOneBrowser (browser: Browser): Promise<boolean | FoundBrowser> {
   .then(pickBrowserProps)
   .then(tap(logBrowser))
   .then((browser) => setMajorVersion(browser))
-  .then(maybeSetFirefoxWarning)
   .catch(failed)
 }
 
-export const firefoxGcWarning = 'This version of Firefox has a bug that causes excessive memory consumption and will cause your tests to run slowly. It is recommended to upgrade to Firefox 80 or newer. [Learn more.](https://docs.cypress.io/guides/references/configuration.html#firefoxGcInterval)'
-
-// @see https://github.com/cypress-io/cypress/issues/8241
-const maybeSetFirefoxWarning = (browser: FoundBrowser) => {
-  if (browser.family === 'firefox' && Number(browser.majorVersion) < 80) {
-    browser.warning = firefoxGcWarning
-  }
-
-  return browser
-}
-
 /** returns list of detected browsers */
 export const detect = (goalBrowsers?: Browser[]): Bluebird<FoundBrowser[]> => {
   // we can detect same browser under different aliases
@@ -232,7 +220,6 @@ export const detectByPath = (
 
     return setCustomBrowserData(browser, pathData.path, version)
   })
-  .then(maybeSetFirefoxWarning)
   .catch((err: NotDetectedAtPathError) => {
     if (err.notDetectedAtPath) {
       throw err

packages/launcher/test/unit/detect_spec.ts

@@ -1,5 +1,5 @@
 require('../spec_helper')
-import { firefoxGcWarning, detect, detectByPath, setMajorVersion } from '../../lib/detect'
+import { detect, detectByPath, setMajorVersion } from '../../lib/detect'
 import { goalBrowsers } from '../fixtures'
 import { expect } from 'chai'
 import { utils } from '../../lib/utils'
@@ -167,20 +167,5 @@ describe('browser detection', () => {
       expect(foundBrowser.warning).to.contain('does not support running Custom Firefox version 85')
       .and.contain('Firefox newer than or equal to 86')
     })
-
-    // @see https://github.com/cypress-io/cypress/issues/8241
-    it('adds warnings to Firefox versions less than 80', async () => {
-      execa.withArgs('/good-firefox', ['--version'])
-      .resolves({ stdout: 'Mozilla Firefox 80.0' })
-
-      execa.withArgs('/bad-firefox', ['--version'])
-      .resolves({ stdout: 'Mozilla Firefox 79.1' })
-
-      // TODO: remove this warning/auto-GC, since Cy no longer supports FF < 86
-      // expect(await detectByPath('/good-firefox')).to.not.have.property('warning')
-      expect(await detectByPath('/bad-firefox')).to.include({
-        warning: firefoxGcWarning,
-      })
-    })
   })
 })