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by mozilla-mobile

mozilla-mobile /firefox-ios

Firefox for iOS

9.5K Stars 2.3K Forks Last release: 11 days ago (v28.0) Mozilla Public License 2.0 8.3K Commits 115 Releases

Available items

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The developer of this repository has not created any items for sale yet. Need a bug fixed? Help with integration? A different license? Create a request here:

Firefox for iOS codebeat badge BuddyBuild codecov

Download on the App Store.

This branch (main)

This branch only works with Xcode 11.5, Swift 5.2 and supports iOS 12.0 and above.

Please make sure you aim your pull requests in the right direction.

For bug fixes and features for a specific release use the version branch.

Getting involved

Want to contribute but don't know where to start? Here is a list of issues that are contributor friendly

Building the code

  1. Install the latest Xcode developer tools from Apple.
  2. Install Carthage and Node
    shell brew update brew install carthage brew install node
  3. Clone the repository:
    shell git clone
  4. Pull in the project dependencies:
    shell cd firefox-ios sh ./
  5. Open
    in Xcode.
  6. Build the
    scheme in Xcode.

Building User Scripts

User Scripts (JavaScript injected into the


) are compiled, concatenated and minified using webpack. User Scripts to be aggregated are placed in the following directories:

/Client |-- /Frontend |-- /UserContent |-- /UserScripts |-- /AllFrames | |-- /AtDocumentEnd | |-- /AtDocumentStart |-- /MainFrame |-- /AtDocumentEnd |-- /AtDocumentStart

This reduces the total possible number of User Scripts down to four. The compiled output from concatenating and minifying the User Scripts placed in these folders resides in


and are named accordingly:

  • AllFramesAtDocumentStart.js
  • MainFrameAtDocumentEnd.js
  • MainFrameAtDocumentStart.js

To simplify the build process, these compiled files are checked-in to this repository. When adding or editing User Scripts, these files can be re-compiled with


manually. This requires Node.js to be installed and all required


packages can be installed by running

npm install

in the root directory of the project. User Scripts can be compiled by running the following


command in the root directory of the project:

npm run build


Want to contribute to this repository? Check out Contributing Guidelines

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