> ## Documentation Index > Fetch the complete documentation index at: https://kernel.sh/docs/llms.txt > Use this file to discover all available pages before exploring further. # Ad-hoc upload one or more unpacked extensions to a running browser instance. > Loads one or more unpacked extensions and restarts Chromium on the browser instance. ## OpenAPI ````yaml https://app.stainless.com/api/spec/documented/kernel/openapi.documented.yml post /browsers/{id}/extensions openapi: 3.1.0 info: title: Kernel API description: Developer tools and cloud infrastructure for AI agents to use web browsers version: 0.1.0 servers: - url: https://api.onkernel.com description: API Server security: - bearerAuth: [] tags: - name: Browsers description: Create and manage browser sessions. - name: Browser Computer Controls description: Control mouse, keyboard, and screen on the browser instance. - name: Browser Playwright description: Execute Playwright code against the browser instance. - name: Browser Filesystem description: Read, write, and manage files on the browser instance. - name: Browser Processes description: Execute and manage processes on the browser instance. - name: Browser Replays description: Record and manage browser session video replays. - name: Browser Logs description: Stream logs from the browser instance. - name: Browser Telemetry description: Stream live telemetry events from a browser session. - name: Profiles description: Create, list, retrieve, and delete browser profiles. - name: Proxies description: Create and manage proxy configurations for routing browser traffic. - name: Extensions description: Create, list, retrieve, and delete browser extensions. - name: Browser Pools description: Create and manage browser pools for acquiring and releasing browsers. - name: Managed Auth description: >- Create and manage auth connections for automated credential capture and login. - name: Credentials description: Create and manage credentials for authentication. - name: Credential Providers description: Configure external credential providers like 1Password. - name: Apps description: List applications and versions. - name: Deployments description: Create and manage app deployments and stream deployment events. - name: Invocations description: Invoke actions and stream or query invocation status and events. - name: Organization description: Read and manage organization-level limits. - name: Projects description: Create and manage projects for resource isolation within an organization. - name: API Keys description: Create and manage API keys for organization and project-scoped access. - name: Audit Logs description: Read audit log records for the authenticated organization. paths: /browsers/{id}/extensions: post: tags: - Browsers summary: >- Ad-hoc upload one or more unpacked extensions to a running browser instance. description: >- Loads one or more unpacked extensions and restarts Chromium on the browser instance. operationId: uploadExtensionsToBrowser parameters: - name: id in: path required: true schema: type: string description: Browser session ID requestBody: required: true content: multipart/form-data: schema: type: object properties: extensions: type: array description: List of extensions to upload and activate items: type: object properties: zip_file: type: string format: binary description: >- Zip archive containing an unpacked Chromium extension (must include manifest.json) name: type: string description: >- Folder name to place the extension under /home/kernel/extensions/ minLength: 1 maxLength: 255 pattern: ^[a-zA-Z0-9._-]{1,255}$ required: - zip_file - name required: - extensions responses: '201': description: Extensions uploaded, Chromium restarted, and DevTools is ready '400': $ref: '#/components/responses/BadRequest' '401': $ref: '#/components/responses/Unauthorized' '403': $ref: '#/components/responses/Forbidden' '404': $ref: '#/components/responses/NotFound' '500': $ref: '#/components/responses/InternalError' security: - bearerAuth: [] x-codeSamples: - lang: JavaScript source: |- import Kernel from '@onkernel/sdk'; const client = new Kernel({ apiKey: process.env['KERNEL_API_KEY'], // This is the default and can be omitted }); await client.browsers.loadExtensions('id', { extensions: [{ name: 'name', zip_file: fs.createReadStream('path/to/file') }], }); - lang: Python source: |- import os from kernel import Kernel client = Kernel( api_key=os.environ.get("KERNEL_API_KEY"), # This is the default and can be omitted ) client.browsers.load_extensions( id="id", extensions=[{ "name": "name", "zip_file": b"Example data", }], ) - lang: Go source: "package main\n\nimport (\n\t\"bytes\"\n\t\"context\"\n\t\"io\"\n\n\t\"github.com/kernel/kernel-go-sdk\"\n\t\"github.com/kernel/kernel-go-sdk/option\"\n)\n\nfunc main() {\n\tclient := kernel.NewClient(\n\t\toption.WithAPIKey(\"My API Key\"),\n\t)\n\terr := client.Browsers.LoadExtensions(\n\t\tcontext.TODO(),\n\t\t\"id\",\n\t\tkernel.BrowserLoadExtensionsParams{\n\t\t\tExtensions: []kernel.BrowserLoadExtensionsParamsExtension{{\n\t\t\t\tName: \"name\",\n\t\t\t\tZipFile: io.Reader(bytes.NewBuffer([]byte(\"Example data\"))),\n\t\t\t}},\n\t\t},\n\t)\n\tif err != nil {\n\t\tpanic(err.Error())\n\t}\n}\n" components: responses: BadRequest: description: Bad Request – invalid input content: application/json: schema: $ref: '#/components/schemas/Error' Unauthorized: description: Unauthorized – missing or invalid authorization token content: application/json: schema: $ref: '#/components/schemas/Error' Forbidden: description: Forbidden – insufficient permissions or plan content: application/json: schema: $ref: '#/components/schemas/Error' NotFound: description: Resource not found content: application/json: schema: $ref: '#/components/schemas/Error' InternalError: description: Internal Server Error content: application/json: schema: $ref: '#/components/schemas/Error' schemas: Error: type: object required: - code - message properties: code: type: string description: Application-specific error code (machine-readable) example: bad_request message: type: string description: Human-readable error description for debugging example: 'Missing required field: app_name' details: type: array description: Additional error details (for multiple errors) items: $ref: '#/components/schemas/ErrorDetail' inner_error: $ref: '#/components/schemas/ErrorDetail' ErrorDetail: type: object properties: code: type: string description: Lower-level error code providing more specific detail example: invalid_input message: type: string description: Further detail about the error example: Provided version string is not semver compliant securitySchemes: bearerAuth: type: http scheme: bearer ````