diff --git a/docs/docs/getting-started.mdx b/docs/docs/getting-started.mdx
index c74c15ec7..6a5fdee27 100644
--- a/docs/docs/getting-started.mdx
+++ b/docs/docs/getting-started.mdx
@@ -237,7 +237,6 @@ long.
 
 We support [esbuild](https://esbuild.github.io).
 Install and configure the esbuild plugin [`@mdx-js/esbuild`][mdx-esbuild].
-This plugin has an additional option `allowDangerousRemoteMdx`.
 [Configure your JSX runtime][jsx] depending on which one you use (React, Preact,
 Vue, etc.).
 
diff --git a/package-lock.json b/package-lock.json
index 13dc15b97..7db511277 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -738,14 +738,6 @@
         "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
       }
     },
-    "node_modules/@fastify/busboy": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/@fastify/busboy/-/busboy-2.0.0.tgz",
-      "integrity": "sha512-JUFJad5lv7jxj926GPgymrWQxxjPYuJNiNjNMzqT+HiuP6Vl3dk5xzG+8sTX96np0ZAluvaMzPsjhHZ5rNuNQQ==",
-      "engines": {
-        "node": ">=14"
-      }
-    },
     "node_modules/@humanwhocodes/config-array": {
       "version": "0.11.13",
       "resolved": "https://registry.npmjs.org/@humanwhocodes/config-array/-/config-array-0.11.13.tgz",
@@ -26195,17 +26187,6 @@
         "node": ">=0.10.0"
       }
     },
-    "node_modules/undici": {
-      "version": "5.26.4",
-      "resolved": "https://registry.npmjs.org/undici/-/undici-5.26.4.tgz",
-      "integrity": "sha512-OG+QOf0fTLtazL9P9X7yqWxQ+Z0395Wk6DSkyTxtaq3wQEjIroVe7Y4asCX/vcCxYpNGMnwz8F0qbRYUoaQVMw==",
-      "dependencies": {
-        "@fastify/busboy": "^2.0.0"
-      },
-      "engines": {
-        "node": ">=14.0"
-      }
-    },
     "node_modules/undici-types": {
       "version": "5.25.3",
       "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-5.25.3.tgz",
@@ -28632,7 +28613,6 @@
       "dependencies": {
         "@mdx-js/mdx": "^2.0.0",
         "@types/unist": "^3.0.0",
-        "undici": "^5.0.0",
         "vfile": "^6.0.0",
         "vfile-message": "^4.0.0"
       },
diff --git a/packages/esbuild/lib/index.js b/packages/esbuild/lib/index.js
index 12a5f14a7..d6f35bbc8 100644
--- a/packages/esbuild/lib/index.js
+++ b/packages/esbuild/lib/index.js
@@ -1,5 +1,5 @@
 /**
- * @typedef {import('@mdx-js/mdx').ProcessorOptions} ProcessorOptions
+ * @typedef {import('@mdx-js/mdx').CompileOptions} CompileOptions
  * @typedef {import('esbuild').Message} Message
  * @typedef {import('esbuild').OnLoadArgs} OnLoadArgs
  * @typedef {import('esbuild').OnLoadResult} OnLoadResult
@@ -10,15 +10,6 @@
  */
 
 /**
- * @typedef EsbuildOptions
- *   Extra options.
- * @property {boolean | null | undefined} [allowDangerousRemoteMdx=false]
- *   Whether to allow importing from `http:` and `https:` URLs (`boolean`,
- *   default: `false`).
- *
- *   When passing `allowDangerousRemoteMdx`, MD(X) *and* JS files can be
- *   imported from `http:` and `https:` urls.
- *
  * @typedef {Omit<OnLoadArgs, 'pluginData'> & LoadDataFields} LoadData
  *   Data passed to `onload`.
  *
@@ -27,22 +18,10 @@
  * @property {PluginData | null | undefined} [pluginData]
  *   Plugin data.
  *
- * @typedef {EsbuildOptions & ProcessorOptions} Options
+ * @typedef {CompileOptions} Options
  *   Configuration.
  *
- *   Options are the same as `compile` from `@mdx-js/mdx` with the addition
- *   of `allowDangerousRemoteMdx`.
- *
- *   ###### Notes
- *
- *   > ⚠️ **Security**: `allowDangerousRemoteMdx` (intentionally) enabled remote
- *   > code execution.
- *   > Make sure you trust your code!
- *   > See [§ Security][security] for more
- *   > info.
- *
- *   > 💡 **Experiment**: `allowDangerousRemoteMdx` is an experimental feature
- *   > that might not work well and might change in minor releases.
+ *   Options are the same as `compile` from `@mdx-js/mdx`.
  *
  * @typedef PluginData
  *   Extra data passed.
@@ -62,20 +41,14 @@
 import assert from 'node:assert'
 import fs from 'node:fs/promises'
 import path from 'node:path'
-import process from 'node:process'
 import {createFormatAwareProcessors} from '@mdx-js/mdx/internal-create-format-aware-processors'
 import {extnamesToRegex} from '@mdx-js/mdx/internal-extnames-to-regex'
-import {fetch} from 'undici'
 import {VFile} from 'vfile'
 import {VFileMessage} from 'vfile-message'
 
 const eol = /\r\n|\r|\n|\u2028|\u2029/g
 
-/** @type {Map<string, string>} */
-const cache = new Map()
 const name = '@mdx-js/esbuild'
-const p = process
-const remoteNamespace = name + '-remote'
 
 /**
  * Create an esbuild plugin to compile MDX to JS.
@@ -92,8 +65,7 @@ const remoteNamespace = name + '-remote'
  *   Plugin.
  */
 export function esbuild(options) {
-  const {allowDangerousRemoteMdx, ...rest} = options || {}
-  const {extnames, process} = createFormatAwareProcessors(rest)
+  const {extnames, process} = createFormatAwareProcessors(options || {})
 
   return {name, setup}
 
@@ -104,85 +76,7 @@ export function esbuild(options) {
    *   Nothing.
    */
   function setup(build) {
-    const filter = extnamesToRegex(extnames)
-    const filterHttp = new RegExp('^https?:\\/{2}.+' + filter.source)
-    const http = /^https?:\/{2}/
-    const filterHttpOrRelative = /^(https?:\/{2}|.{1,2}\/).*/
-
-    if (allowDangerousRemoteMdx) {
-      // Intercept import paths starting with "http:" and "https:" so
-      // esbuild doesn't attempt to map them to a file system location.
-      // Tag them with the "http-url" namespace to associate them with
-      // this plugin.
-      build.onResolve(
-        {filter: filterHttp, namespace: 'file'},
-        resolveRemoteInLocal
-      )
-
-      build.onResolve(
-        {filter: filterHttpOrRelative, namespace: remoteNamespace},
-        resolveInRemote
-      )
-    }
-
-    build.onLoad({filter: /.*/, namespace: remoteNamespace}, onloadremote)
-    build.onLoad({filter}, onload)
-
-    /** @param {OnResolveArgs} args */
-    function resolveRemoteInLocal(args) {
-      return {namespace: remoteNamespace, path: args.path}
-    }
-
-    // Intercept all import paths inside downloaded files and resolve them against
-    // the original URL. All of these
-    // files will be in the "http-url" namespace. Make sure to keep
-    // the newly resolved URL in the "http-url" namespace so imports
-    // inside it will also be resolved as URLs recursively.
-    /** @param {OnResolveArgs} args */
-    function resolveInRemote(args) {
-      return {
-        namespace: remoteNamespace,
-        path: String(new URL(args.path, args.importer))
-      }
-    }
-
-    /**
-     * @param {OnLoadArgs} data
-     *   Data.
-     * @returns {Promise<OnLoadResult>}
-     *   Result.
-     */
-    async function onloadremote(data) {
-      const href = data.path
-      console.log('%s: downloading `%s`', remoteNamespace, href)
-
-      /** @type {string} */
-      let contents
-
-      const cachedContents = cache.get(href)
-      if (cachedContents) {
-        contents = cachedContents
-      } else {
-        const response = await fetch(href)
-        contents = await response.text()
-        cache.set(href, contents)
-      }
-
-      if (filter.test(href)) {
-        // Clean search and hash from URL.
-        const url = new URL(href)
-        url.hash = ''
-        url.search = ''
-        return onload({
-          namespace: 'file',
-          path: url.href,
-          pluginData: {contents},
-          suffix: ''
-        })
-      }
-
-      return {contents, loader: 'js', resolveDir: p.cwd()}
-    }
+    build.onLoad({filter: extnamesToRegex(extnames)}, onload)
 
     /**
      * @param {LoadData} data
@@ -240,9 +134,7 @@ export function esbuild(options) {
       return {
         contents: value || '',
         errors,
-        resolveDir: http.test(file.path)
-          ? p.cwd()
-          : path.resolve(file.cwd, file.dirname),
+        resolveDir: path.resolve(file.cwd, file.dirname),
         warnings
       }
     }
diff --git a/packages/esbuild/package.json b/packages/esbuild/package.json
index beb85e411..f5b4e3af7 100644
--- a/packages/esbuild/package.json
+++ b/packages/esbuild/package.json
@@ -39,7 +39,6 @@
   "dependencies": {
     "@mdx-js/mdx": "^2.0.0",
     "@types/unist": "^3.0.0",
-    "undici": "^5.0.0",
     "vfile": "^6.0.0",
     "vfile-message": "^4.0.0"
   },
diff --git a/packages/esbuild/readme.md b/packages/esbuild/readme.md
index 847a7b47c..b89eb9666 100644
--- a/packages/esbuild/readme.md
+++ b/packages/esbuild/readme.md
@@ -97,64 +97,7 @@ ESBuild plugin ([`Plugin`][esbuild-plugin] from `esbuild`).
 
 Configuration (TypeScript type).
 
-Options are the same as [`CompileOptions` from `@mdx-js/mdx`][compile-options]
-with the addition of `allowDangerousRemoteMdx`:
-
-###### Fields
-
-*   `allowDangerousRemoteMdx` (`boolean`, default: `false`)
-    — whether to allow importing from `http:` and `https:` URLs;
-    when passing `allowDangerousRemoteMdx`, MD(X) *and* JS files can be imported
-    from `http:` and `https:` urls;
-
-###### Notes
-
-> ⚠️ **Security**: `allowDangerousRemoteMdx` (intentionally) enabled remote
-> code execution.
-> Make sure you trust your code!
-> See [§ Security][security] for more
-> info.
-
-> 💡 **Experiment**: `allowDangerousRemoteMdx` is an experimental feature that
-> might not work well and might change in minor releases.
-
-## Examples
-
-### Use `allowDangerousRemoteMdx`
-
-Take this `index.mdx` file:
-
-```mdx
-import Readme from 'https://raw.githubusercontent.com/mdx-js/mdx/main/readme.md'
-
-Here’s the readme:
-
-<Readme />
-```
-
-…and a module `build.js`:
-
-```tsx
-import mdx from '@mdx-js/esbuild'
-import esbuild from 'esbuild'
-
-await esbuild.build({
-  entryPoints: ['index.mdx'],
-  format: 'esm',
-  outfile: 'output.js',
-  plugins: [mdx({allowDangerousRemoteMdx: true, /* Other options… */})]
-})
-```
-
-…then running that (`node build.js`) and evaluating `output.js` (depends on how
-you evaluate React or another framework) would give:
-
-```tsx
-<p>Here’s the readme:</p>
-<h1>MDX: Markdown for the component era 🚀</h1>
-{/* … */}
-<p><a href="https://github.com/mdx-js/mdx/blob/main/license">MIT</a> © …</p>
-```
+Options are the same as [`CompileOptions` from `@mdx-js/mdx`][compile-options].
 
 ## Types
 
diff --git a/packages/esbuild/test/files/components.js b/packages/esbuild/test/files/components.js
deleted file mode 100644
index 0a0d48143..000000000
--- a/packages/esbuild/test/files/components.js
+++ /dev/null
@@ -1,23 +0,0 @@
-import React from 'react'
-
-/**
- * @param {JSX.IntrinsicElements['span']} props
- *   Props.
- * @returns
- *   `span` element.
- */
-export function Pill(props) {
-  return React.createElement('span', {...props, style: {color: 'red'}})
-}
-
-/**
- * @param {JSX.IntrinsicElements['div']} props
- *   Props.
- * @returns
- *   `div` element.
- */
-export function Layout(props) {
-  return React.createElement('div', {...props, style: {color: 'red'}})
-}
-
-export default Layout
diff --git a/packages/esbuild/test/files/md-file.md b/packages/esbuild/test/files/md-file.md
deleted file mode 100644
index 637d21052..000000000
--- a/packages/esbuild/test/files/md-file.md
+++ /dev/null
@@ -1 +0,0 @@
-Some content.
diff --git a/packages/esbuild/test/files/mdx-file-importing-markdown.mdx b/packages/esbuild/test/files/mdx-file-importing-markdown.mdx
deleted file mode 100644
index 2563edeaf..000000000
--- a/packages/esbuild/test/files/mdx-file-importing-markdown.mdx
+++ /dev/null
@@ -1,8 +0,0 @@
-import {Pill} from './components.js'
-import Content from './md-file.md'
-
-# heading
-
-A <Pill>little pill</Pill>.
-
-<Content />
diff --git a/packages/esbuild/test/index.js b/packages/esbuild/test/index.js
index 407b9b940..d517a8f50 100644
--- a/packages/esbuild/test/index.js
+++ b/packages/esbuild/test/index.js
@@ -539,78 +539,6 @@ test('@mdx-js/esbuild', async function (t) {
       await fs.rm(jsUrl)
     }
   )
-
-  await t.test(
-    'should compile remote markdown files w/ `allowDangerousRemoteMdx`',
-    async function () {
-      const mdxUrl = new URL('esbuild.mdx', import.meta.url)
-      const jsUrl = new URL('esbuild.js', import.meta.url)
-
-      await fs.writeFile(
-        mdxUrl,
-        'import Content from "https://raw.githubusercontent.com/mdx-js/mdx/main/packages/esbuild/test/files/md-file.md"\n\n<Content />'
-      )
-
-      console.warn('note: the following warning is expected')
-      await esbuild.build({
-        entryPoints: [fileURLToPath(mdxUrl)],
-        outfile: fileURLToPath(jsUrl),
-        bundle: true,
-        define: {'process.env.NODE_ENV': '"development"'},
-        format: 'esm',
-        plugins: [esbuildMdx({allowDangerousRemoteMdx: true})]
-      })
-      console.warn('note: the preceding warning was expected')
-
-      /** @type {MDXModule} */
-      const mod = await import(jsUrl.href + '#' + Math.random())
-      const Content = mod.default
-
-      assert.equal(
-        renderToStaticMarkup(React.createElement(Content)),
-        '<p>Some content.</p>'
-      )
-
-      await fs.rm(mdxUrl)
-      await fs.rm(jsUrl)
-    }
-  )
-
-  await t.test(
-    'should compile remote MD, MDX, and JS files w/ `allowDangerousRemoteMdx`',
-    async function () {
-      const mdxUrl = new URL('esbuild.mdx', import.meta.url)
-      const jsUrl = new URL('esbuild.js', import.meta.url)
-
-      await fs.writeFile(
-        mdxUrl,
-        'import Content from "https://raw.githubusercontent.com/mdx-js/mdx/main/packages/esbuild/test/files/mdx-file-importing-markdown.mdx"\n\n<Content />'
-      )
-
-      console.warn('note: the following 3 warnings are expected')
-      await esbuild.build({
-        entryPoints: [fileURLToPath(mdxUrl)],
-        outfile: fileURLToPath(jsUrl),
-        bundle: true,
-        define: {'process.env.NODE_ENV': '"development"'},
-        format: 'esm',
-        plugins: [esbuildMdx({allowDangerousRemoteMdx: true})]
-      })
-      console.warn('note: the preceding 3 warnings were expected')
-
-      /** @type {MDXModule} */
-      const mod = await import(jsUrl.href + '#' + Math.random())
-      const Content = mod.default
-
-      assert.equal(
-        renderToStaticMarkup(React.createElement(Content)),
-        '<h1>heading</h1>\n<p>A <span style="color:red">little pill</span>.</p>\n<p>Some content.</p>'
-      )
-
-      await fs.rm(mdxUrl)
-      await fs.rm(jsUrl)
-    }
-  )
 })
 
 /**
diff --git a/packages/node-loader/package.json b/packages/node-loader/package.json
index 76554283a..71eb1cdcb 100644
--- a/packages/node-loader/package.json
+++ b/packages/node-loader/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@mdx-js/node-loader",
   "version": "2.3.0",
-  "description": "Experimental Node loader for MDX",
+  "description": "Node.js loader for MDX",
   "license": "MIT",
   "keywords": [
     "jsx",