diff --git a/cli/types/cypress.d.ts b/cli/types/cypress.d.ts
index 26cbc3f07f9c..b35b84c42a67 100644
--- a/cli/types/cypress.d.ts
+++ b/cli/types/cypress.d.ts
@@ -3112,7 +3112,11 @@ declare namespace Cypress {
      * @default null
      */
     experimentalSkipDomainInjection: string[] | null
-    // TODO: document
+    /**
+     * Enables setting document.domain to the superdomain on code injection. This option is
+     * disabled by default. Enabling this option allows for navigating between subdomains in
+     * the same test without the use of cy.origin().
+     */
     injectDocumentDomain: boolean
     /**
      * Enables AST-based JS/HTML rewriting. This may fix issues caused by the existing regex-based JS/HTML replacement algorithm.
diff --git a/npm/vite-dev-server/src/plugins/cypress.ts b/npm/vite-dev-server/src/plugins/cypress.ts
index 92d770b64c07..7d85fdd07b97 100644
--- a/npm/vite-dev-server/src/plugins/cypress.ts
+++ b/npm/vite-dev-server/src/plugins/cypress.ts
@@ -99,7 +99,7 @@ export const Cypress = (
     },
     configureServer: async (server: ViteDevServer) => {
       server.middlewares.use(`${base}index.html`, async (req, res) => {
-        let transformedIndexHtml = await server.transformIndexHtml(base, '')
+        const transformedIndexHtml = await server.transformIndexHtml(base, '')
 
         return res.end(transformedIndexHtml)
       })
diff --git a/packages/config/test/index.spec.ts b/packages/config/test/index.spec.ts
index d5c29784b578..60ee518fd2fd 100644
--- a/packages/config/test/index.spec.ts
+++ b/packages/config/test/index.spec.ts
@@ -247,15 +247,12 @@ describe('config/src/index', () => {
 
   describe('.validateNeedToRestartOnChange', () => {
     it('returns the need to restart if given key has changed', () => {
-      let result = configUtil.validateNeedToRestartOnChange({ blockHosts: [] }, { blockHosts: ['https://example.com'] })
-
-      expect(result).to.eql({
+      expect(configUtil.validateNeedToRestartOnChange({ blockHosts: [] }, { blockHosts: ['https://example.com'] })).to.eql({
         server: true,
         browser: false,
       })
 
-      result = configUtil.validateNeedToRestartOnChange({ injectDocumentDomain: true }, {})
-      expect(result).to.eql({
+      expect(configUtil.validateNeedToRestartOnChange({ injectDocumentDomain: true }, {})).to.eql({
         server: true,
         browser: false,
       })
diff --git a/packages/driver/cypress.config.ts b/packages/driver/cypress.config.ts
index 2d79495144a1..12f6a552ed72 100644
--- a/packages/driver/cypress.config.ts
+++ b/packages/driver/cypress.config.ts
@@ -19,7 +19,6 @@ export default defineConfig({
     configFile: '../../mocha-reporter-config.json',
   },
   e2e: {
-    excludeSpecPattern: 'cypress/**/with-inject-document-domain/**/*.cy.{js,ts}',
     experimentalOriginDependencies: true,
     experimentalModifyObstructiveThirdPartyCode: true,
     setupNodeEvents: (on, config) => {
diff --git a/packages/driver/cypress/e2e/e2e/origin/cookie_behavior.cy.ts b/packages/driver/cypress/e2e/e2e/origin/cookie_behavior.cy.ts
index fcdfdaff16f6..ac42d31e690c 100644
--- a/packages/driver/cypress/e2e/e2e/origin/cookie_behavior.cy.ts
+++ b/packages/driver/cypress/e2e/e2e/origin/cookie_behavior.cy.ts
@@ -1286,7 +1286,7 @@ describe('Cookie Behavior', { browser: '!webkit' }, () => {
         describe('misc', () => {
           describe('domains', () => {
             // NOTE: tested in ./with-inject-document-domain/cookie_behavior
-            it.skip('attaches subdomain and TLD cookies when making subdomain requests', () => {
+            it('attaches subdomain and TLD cookies when making subdomain requests', () => {
               cy.intercept(`${scheme}://app.foobar.com:${crossOriginPort}/test-request`, (req) => {
                 expect(req['headers']['cookie']).to.equal('foo=bar; bar=baz')
 
diff --git a/packages/driver/cypress/e2e/e2e/privileged_commands.cy.ts b/packages/driver/cypress/e2e/e2e/privileged_commands.cy.ts
index f134d463309d..6dc09d2bcceb 100644
--- a/packages/driver/cypress/e2e/e2e/privileged_commands.cy.ts
+++ b/packages/driver/cypress/e2e/e2e/privileged_commands.cy.ts
@@ -221,8 +221,8 @@ describe('privileged commands', () => {
     }
 
     strategies.forEach((strategy) => {
-      describe(`strategy: ${strategy}`, () => {
-        commands.forEach((command) => {
+      commands.forEach((command) => {
+        describe(`strategy: ${strategy}`, () => {
           describe(`command: ${command}`, () => {
             it('fails in html script', (done) => {
               cy.on('fail', (err) => {
diff --git a/packages/driver/src/cy/commands/sessions/index.ts b/packages/driver/src/cy/commands/sessions/index.ts
index 5360d4a02472..8c116c8870ed 100644
--- a/packages/driver/src/cy/commands/sessions/index.ts
+++ b/packages/driver/src/cy/commands/sessions/index.ts
@@ -254,7 +254,6 @@ export default function (Commands, Cypress, cy) {
 
               const userInvocationStack = $errUtils.getUserInvocationStack(err, Cypress.state)
 
-              //console.log('enhancingStack from session', { err, userInvocationStack })
               err = $errUtils.enhanceStack({
                 err,
                 userInvocationStack,
diff --git a/packages/driver/src/cypress/cy.ts b/packages/driver/src/cypress/cy.ts
index d862986b4e71..8f82d49b298f 100644
--- a/packages/driver/src/cypress/cy.ts
+++ b/packages/driver/src/cypress/cy.ts
@@ -390,7 +390,6 @@ export class $Cy extends EventEmitter2 implements ITimeouts, IStability, IAssert
 
     const userInvocationStack = $errUtils.getUserInvocationStack(err, this.state)
 
-    //console.log('enhancing stack', { errStack: err.stack, userInvocationStack })
     err = $errUtils.enhanceStack({
       err,
       userInvocationStack,
diff --git a/packages/driver/src/cypress/error_utils.ts b/packages/driver/src/cypress/error_utils.ts
index d9265a6f5411..4512f0565772 100644
--- a/packages/driver/src/cypress/error_utils.ts
+++ b/packages/driver/src/cypress/error_utils.ts
@@ -431,17 +431,12 @@ const createUncaughtException = ({ frameType, handlerType, state, err }) => {
 // but the stack points to cypress internals. here we replace the internal
 // cypress stack with the invocation stack, which points to the user's code
 const stackAndCodeFrameIndex = (err, userInvocationStack): StackAndCodeFrameIndex => {
-  //console.log('stackAndCodeFrameIndex', { isCypressErr: isCypressErr(err), isChai: isChaiValidationErr(err) })
   if (!userInvocationStack) return { stack: err.stack }
 
   if (isCypressErr(err) || isChaiValidationErr(err)) {
-    //console.log('splicing userInvocationStack')
-
     return $stackUtils.stackWithUserInvocationStackSpliced(err, userInvocationStack)
   }
 
-  //console.log('returning new stack from userInvocationStack')
-
   return { stack: $stackUtils.replacedStack(err, userInvocationStack) || '' }
 }
 
diff --git a/packages/driver/src/cypress/stack_utils.ts b/packages/driver/src/cypress/stack_utils.ts
index 2164f0e79e83..c28049d262bc 100644
--- a/packages/driver/src/cypress/stack_utils.ts
+++ b/packages/driver/src/cypress/stack_utils.ts
@@ -31,10 +31,11 @@ const hasCrossFrameStacks = (specWindow) => {
   return topStack === specStack
 }
 
-const stackWithContentAppended = (err, stack: string = '') => {
+const stackWithContentAppended = (err, stack: string | undefined) => {
+  const usableStack = stack ?? ''
   const appendToStack = err.appendToStack
 
-  if (!appendToStack || !appendToStack.content) return stack
+  if (!appendToStack || !appendToStack.content) return usableStack
 
   delete err.appendToStack
 
@@ -43,7 +44,7 @@ const stackWithContentAppended = (err, stack: string = '') => {
   const normalizedContent = normalizeStackIndentation(appendToStack.content)
   const content = $utils.indent(normalizedContent, 2)
 
-  return `${stack}\n\n${appendToStack.title}:\n${content}`
+  return `${usableStack}\n\n${appendToStack.title}:\n${content}`
 }
 
 const stackWithLinesRemoved = (stack, cb) => {
diff --git a/packages/network/lib/document-domain-injection.ts b/packages/network/lib/document-domain-injection.ts
index 18b11484088f..c141b1c7a0a5 100644
--- a/packages/network/lib/document-domain-injection.ts
+++ b/packages/network/lib/document-domain-injection.ts
@@ -17,6 +17,30 @@ import type { ParsedHostWithProtocolAndHost } from './types'
 
 const debug = Debug('cypress:network:document-domain-injection')
 
+export abstract class DocumentDomainInjection {
+  public static InjectionBehavior (config: { injectDocumentDomain?: boolean, testingType?: 'e2e' | 'component'}): DocumentDomainInjection {
+    debug('Determining injection behavior for config values: %o', {
+      injectDocumentDomain: config.injectDocumentDomain,
+      testingType: config.testingType,
+    })
+
+    if (config.injectDocumentDomain && config.testingType !== 'component') {
+      debug('Returning document domain injection behavior')
+
+      return new DocumentDomainBehavior()
+    }
+
+    debug('Returning origin behavior - no document domain injection')
+
+    return new OriginBehavior()
+  }
+
+  public abstract getOrigin (url: string): string
+  public abstract getHostname (url: string): string
+  public abstract urlsMatch (frameUrl: string | ParsedHostWithProtocolAndHost, topUrl: string | ParsedHostWithProtocolAndHost): boolean
+  public abstract shouldInjectDocumentDomain (url: string | undefined): boolean
+}
+
 export class DocumentDomainBehavior implements DocumentDomainInjection {
   public getOrigin (url: string) {
     return getSuperDomainOrigin(url)
@@ -59,29 +83,3 @@ export class OriginBehavior implements DocumentDomainInjection {
     return false
   }
 }
-
-export abstract class DocumentDomainInjection {
-  public static InjectionBehavior (config: { injectDocumentDomain?: boolean, testingType?: 'e2e' | 'component'}): DocumentDomainInjection {
-    debug('Determining injection behavior for config values: %o', {
-      injectDocumentDomain: config.injectDocumentDomain,
-      testingType: config.testingType,
-    })
-
-    debug('called from', new Error().stack)
-
-    if (config.injectDocumentDomain && config.testingType !== 'component') {
-      debug('Returning document domain injection behavior')
-
-      return new DocumentDomainBehavior()
-    }
-
-    debug('Returning origin behavior - no document domain injection')
-
-    return new OriginBehavior()
-  }
-
-  public abstract getOrigin (url: string): string
-  public abstract getHostname (url: string): string
-  public abstract urlsMatch (frameUrl: string | ParsedHostWithProtocolAndHost, topUrl: string | ParsedHostWithProtocolAndHost): boolean
-  public abstract shouldInjectDocumentDomain (url: string | undefined): boolean
-}
diff --git a/packages/proxy/lib/http/util/rewriter.ts b/packages/proxy/lib/http/util/rewriter.ts
index 69993ab01ffc..de4d286a771f 100644
--- a/packages/proxy/lib/http/util/rewriter.ts
+++ b/packages/proxy/lib/http/util/rewriter.ts
@@ -3,9 +3,6 @@ import * as astRewriter from './ast-rewriter'
 import * as regexRewriter from './regex-rewriter'
 import type { CypressWantsInjection } from '../../types'
 import type { SerializableAutomationCookie } from '@packages/server/lib/util/cookies'
-import Debug from 'debug'
-
-const debug = Debug('cypress:proxy:http:rewriter')
 
 export type SecurityOpts = {
   isNotJavascript?: boolean
@@ -35,7 +32,6 @@ function getRewriter (useAstSourceRewriting: boolean) {
 }
 
 function getHtmlToInject (opts: InjectionOpts & SecurityOpts) {
-  debug('getting html to inject from opts %O', opts)
   const {
     cspNonce,
     domainName,
diff --git a/packages/proxy/test/unit/http/response-middleware.spec.ts b/packages/proxy/test/unit/http/response-middleware.spec.ts
index c4776d325d7d..5f749f4eb231 100644
--- a/packages/proxy/test/unit/http/response-middleware.spec.ts
+++ b/packages/proxy/test/unit/http/response-middleware.spec.ts
@@ -2127,7 +2127,7 @@ describe('http/response-middleware', function () {
       htmlStub.restore()
     })
 
-    ;[true].forEach((injectDocumentDomain) => {
+    ;[true, false].forEach((injectDocumentDomain) => {
       describe(`when injectDocumentDomain is ${injectDocumentDomain}`, () => {
         const config = {
           modifyObstructiveCode: true,
diff --git a/packages/server/lib/privileged-commands/privileged-channel.js b/packages/server/lib/privileged-commands/privileged-channel.js
index a5bac3d05c11..da9771ceebb8 100644
--- a/packages/server/lib/privileged-commands/privileged-channel.js
+++ b/packages/server/lib/privileged-commands/privileged-channel.js
@@ -68,8 +68,6 @@
       )
     })
 
-    //console.log('hasSpecFrameStackLines? ', err.stack, stackLines, filteredLines, filteredLines.length)
-
     return filteredLines.length > 0
   }
 
@@ -82,8 +80,6 @@
       return isInCallback(err) && hasValidCallbackContext
     }
 
-    //console.log('hasCallbackInsideEval', isInCallback(err), stringIncludes.call(err.stack, '> eval line'))
-
     return isInCallback(err) && stringIncludes.call(err.stack, '> eval line')
   }
 
@@ -99,8 +95,6 @@
       return stringIncludes.call(err.stack, script)
     })
 
-    //console.log('hasStackLinesFromSpecOrSupportFile?', scripts, filteredLines)
-
     return filteredLines.length > 0
   }
 
@@ -129,10 +123,7 @@
       return hasSpecBridgeInvocation(err)
     }
 
-    //console.log('should check special case?', { browserFamily, documentDomainContext }, browserFamily && documentDomainContext)
     if (browserFamily === 'chromium' && documentDomainContext) {
-      //console.log('checking special case', browserFamily, documentDomainContext, browserFamily && documentDomainContext)
-
       return hasStackLinesFromSpecOrSupportFile(err) || hasSpecFrameStackLines(err)
     }
 
diff --git a/packages/server/lib/remote_states.ts b/packages/server/lib/remote_states.ts
index ceec9e3e3fd8..79304916ee85 100644
--- a/packages/server/lib/remote_states.ts
+++ b/packages/server/lib/remote_states.ts
@@ -62,8 +62,6 @@ interface RemoteStatesServerPorts {
  * }
  */
 export class RemoteStates {
-  // Cypress.RemoteState was coming from the namespace declared in @packages/net-stubbing, somehow
-  // now it's defined (for a second time) in `./remote_states_abs.ts
   private remoteStates: Map<string, RemoteState> = new Map()
   private primaryOriginKey: string = ''
   private currentOriginKey: string = ''
diff --git a/packages/server/lib/server-base.ts b/packages/server/lib/server-base.ts
index deb11fe2443a..adb78406d702 100644
--- a/packages/server/lib/server-base.ts
+++ b/packages/server/lib/server-base.ts
@@ -15,7 +15,6 @@ import la from 'lazy-ass'
 import httpsProxy from '@packages/https-proxy'
 import { getRoutesForRequest, netStubbingState, NetStubbingState } from '@packages/net-stubbing'
 import { agent, clientCertificates, cors, httpUtils, uri, concatStream, DocumentDomainInjection } from '@packages/network'
-import type { Policy } from '@packages/network/lib/cors'
 import { NetworkProxy, BrowserPreRequest } from '@packages/proxy'
 import type { SocketCt } from './socket-ct'
 import * as errors from './errors'
@@ -159,10 +158,8 @@ export class ServerBase<TSocket extends SocketE2E | SocketCt> {
   protected _eventBus: EventEmitter
   protected _remoteStates: RemoteStates
   private getCurrentBrowser: undefined | (() => Browser)
-  private _originPolicy: Policy = 'same-origin'
   private _urlResolver: Bluebird<Record<string, any>> | null = null
   private testingType?: TestingType
-  private _config: Cfg
   private _documentDomainInjection: DocumentDomainInjection
 
   constructor (config: Cfg) {
@@ -176,8 +173,6 @@ export class ServerBase<TSocket extends SocketE2E | SocketCt> {
     this._fileServer = null
 
     this._documentDomainInjection = DocumentDomainInjection.InjectionBehavior(config)
-    // TODO: maybe dont need to keep this around anymore
-    this._config = config
 
     const remoteStatePorts = () => {
       return {
@@ -248,13 +243,10 @@ export class ServerBase<TSocket extends SocketE2E | SocketCt> {
     onWarning: unknown,
   ): Bluebird<[number, WarningErr?]> {
     return new Bluebird((resolve, reject) => {
-      const { port, fileServerFolder, socketIoRoute, baseUrl, injectDocumentDomain } = config
+      const { port, fileServerFolder, socketIoRoute, baseUrl } = config
 
       this._server = this._createHttpServer(app)
 
-      debug('inject document domain?', injectDocumentDomain)
-      this._originPolicy = injectDocumentDomain ? 'same-super-domain-origin' : 'same-origin'
-
       const onError = (err) => {
         // if the server bombs before starting
         // and the err no is EADDRINUSE