# FirefoxExtensions

[**@openpolyfill/firefox-addon-playwright-harness**](/docs/api/reference)

***

[@openpolyfill/firefox-addon-playwright-harness](/docs/api/reference/globals) / FirefoxExtensions

# Interface: FirefoxExtensions

Defined in: [src/types.ts:117](https://github.com/OpenPolyfill/FirefoxAddonPlaywrightHarness/blob/9532a852e3623332cfb2eacd964ebdb4045220e5/src/types.ts#L117)

Read-only Map-like view of installed extensions, keyed by Gecko extension ID.

## Extends

- `ReadonlyMap`\<`string`, [`FirefoxExtension`](/docs/api/reference/interfaces/FirefoxExtension)\>

## Properties

### size

> `readonly` **size**: `number`

Defined in: node\_modules/typescript/lib/lib.es2015.collection.d.ts:59

#### Inherited from

`ReadonlyMap.size`

## Methods

### \[iterator\]()

> **\[iterator\]**(): `MapIterator`\<\[`string`, [`FirefoxExtension`](/docs/api/reference/interfaces/FirefoxExtension)\]\>

Defined in: node\_modules/typescript/lib/lib.es2015.iterable.d.ts:163

Returns an iterable of entries in the map.

#### Returns

`MapIterator`\<\[`string`, [`FirefoxExtension`](/docs/api/reference/interfaces/FirefoxExtension)\]\>

#### Inherited from

`ReadonlyMap.[iterator]`

***

### entries()

> **entries**(): `MapIterator`\<\[`string`, [`FirefoxExtension`](/docs/api/reference/interfaces/FirefoxExtension)\]\>

Defined in: node\_modules/typescript/lib/lib.es2015.iterable.d.ts:168

Returns an iterable of key, value pairs for every entry in the map.

#### Returns

`MapIterator`\<\[`string`, [`FirefoxExtension`](/docs/api/reference/interfaces/FirefoxExtension)\]\>

#### Inherited from

`ReadonlyMap.entries`

***

### forEach()

> **forEach**(`callbackfn`, `thisArg?`): `void`

Defined in: node\_modules/typescript/lib/lib.es2015.collection.d.ts:56

#### Parameters

##### callbackfn

(`value`, `key`, `map`) => `void`

##### thisArg?

`any`

#### Returns

`void`

#### Inherited from

`ReadonlyMap.forEach`

***

### get()

> **get**(`key`): [`FirefoxExtension`](/docs/api/reference/interfaces/FirefoxExtension) \| `undefined`

Defined in: node\_modules/typescript/lib/lib.es2015.collection.d.ts:57

#### Parameters

##### key

`string`

#### Returns

[`FirefoxExtension`](/docs/api/reference/interfaces/FirefoxExtension) \| `undefined`

#### Inherited from

`ReadonlyMap.get`

***

### has()

> **has**(`key`): `boolean`

Defined in: node\_modules/typescript/lib/lib.es2015.collection.d.ts:58

#### Parameters

##### key

`string`

#### Returns

`boolean`

#### Inherited from

`ReadonlyMap.has`

***

### install()

> **install**(`path`): `Promise`\<[`FirefoxExtension`](/docs/api/reference/interfaces/FirefoxExtension)\>

Defined in: [src/types.ts:119](https://github.com/OpenPolyfill/FirefoxAddonPlaywrightHarness/blob/9532a852e3623332cfb2eacd964ebdb4045220e5/src/types.ts#L119)

Install a directory or XPI into the running Firefox instance.

#### Parameters

##### path

`string`

#### Returns

`Promise`\<[`FirefoxExtension`](/docs/api/reference/interfaces/FirefoxExtension)\>

***

### keys()

> **keys**(): `MapIterator`\<`string`\>

Defined in: node\_modules/typescript/lib/lib.es2015.iterable.d.ts:173

Returns an iterable of keys in the map

#### Returns

`MapIterator`\<`string`\>

#### Inherited from

`ReadonlyMap.keys`

***

### values()

> **values**(): `MapIterator`\<[`FirefoxExtension`](/docs/api/reference/interfaces/FirefoxExtension)\>

Defined in: node\_modules/typescript/lib/lib.es2015.iterable.d.ts:178

Returns an iterable of values in the map

#### Returns

`MapIterator`\<[`FirefoxExtension`](/docs/api/reference/interfaces/FirefoxExtension)\>

#### Inherited from

`ReadonlyMap.values`