base64

We are planning to deprecate the use by Firefox add-ons of the techniques described in this document.

Don't use these techniques to develop new add-ons. Use WebExtensions instead.

If you maintain an add-on which uses the techniques described here, consider migrating it to use WebExtensions instead.

Add-ons developed using these techniques might not work with multiprocess Firefox (e10s), which is already the default in Firefox Nightly and Firefox Developer Edition, and will soon be the default in Beta and Release versions of Firefox. We have documentation on making your add-ons multiprocess-compatible, but it will be more future-proof for you to migrate to WebExtensions.

A wiki page containing resources, migration paths, office hours, and more, is available to help developers transition to the new technologies.

Unstable

Data encoding and decoding using Base64 algorithms.

var base64 = require("sdk/base64");
 
var encodedData = base64.encode("Hello, World");
var decodedData = base64.decode(encodedData);

Globals

Functions

encode(data, charset)

Creates a base-64 encoded ASCII string from a string of binary data.

Parameters

data : string
The data to encode

charset : string
The charset of the string to encode (optional). The only accepted value is "utf-8". In order to encode and decode Unicode strings, the charset parameter needs to be set:

var base64 = require("sdk/base64");

var encodedData = base64.encode(unicodeString, "utf-8");
Returns

string : The encoded string

decode(data, charset)

Decodes a string of data which has been encoded using base-64 encoding.

Parameters

data : string
The encoded data

charset : string
The charset of the string to encode (optional). The only accepted value is "utf-8". In order to encode and decode Unicode strings, the charset parameter needs to be set:

var base64 = require("sdk/base64");

var decodedData = base64.decode(encodedData, "utf-8");
Returns

string : The decoded string

Document Tags and Contributors

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 Contributors to this page: wbamberg
 Last updated by: wbamberg,