macOS
Homebrewverified · 100%
brew install spidermonkeylocal Homebrew formula metadata
MacPortsverified · 94%
sudo port install spidermonkeyMacPorts ports tree · lang/spidermonkey/Portfile · source: api.github.com
brew / rank 1966
Install spidermonkey with Homebrew, MacPorts, pacman
JavaScript-C Engine. Version 140.13.0 via Homebrew; verified 2026-07-21. Also installable with macports: sudo port install spidermonkey.
install
Additional install commands
Linux
Arch Linux pacmanverified · 92%
sudo pacman -S js140Arch Linux sync databases · js140 · source: geo.mirror.pkgbuild.com
overview
Package summary
JavaScript-C Engine
Project links
Commands and aliases
- js
- js140
- js140-config
history
Project history and usage
SpiderMonkey is Mozilla's JavaScript and WebAssembly engine. It is best known as the JavaScript engine inside Firefox, but package managers also expose it as an embeddable engine and standalone JS shell.
Project history
Mozilla's JavaScript engine blog says Brendan Eich wrote the first SpiderMonkey version in 1995. Current Mozilla documentation describes SpiderMonkey as the JavaScript and WebAssembly implementation library of Firefox, with behavior defined by the ECMAScript and WebAssembly specifications.
Adoption history
SpiderMonkey's main adoption path is Firefox, but its standalone shell and embedding APIs have long made it useful to developers, testers, and distribution packagers. The spidermonkey.dev homepage says it is used in Firefox, Servo, and other projects, can be embedded in C++ and Rust projects, run as a standalone shell, and compiled to WASI.
How it is used
Package users often install SpiderMonkey for the js shell, development headers, or embedding experiments rather than as a user-facing app. Mozilla's build documentation describes using mach to build the JS shell, running it with mach run, and testing with jit-tests and jstests.
Why package nerds care
SpiderMonkey matters to package nerds because it is a major browser engine component exposed as a standalone runtime package. Its versioned shells, embedding headers, JIT behavior, WebAssembly support, and test-suite expectations make it a recurring dependency and compatibility target across language-runtime packaging.
Timeline
- 1995: Brendan Eich writes the first SpiderMonkey version.
- 2000s: SpiderMonkey continues as Mozilla's core JavaScript engine and accumulates shell, embedding, and test infrastructure.
- 2010s: Mozilla documents major engine internals and performance work through the JavaScript engine blog and source docs.
- 2020s: SpiderMonkey is documented as a JavaScript and WebAssembly engine used in Firefox and embeddable in C++ and Rust.
Related projects
- Firefox is the primary consumer and source tree for SpiderMonkey.
- Servo is listed by spidermonkey.dev as a user of the engine.
- ECMAScript and WebAssembly specifications define the behavior SpiderMonkey implements.
- Searchfox and Firefox Source Docs are common navigation surfaces for the source.
Sources
- https://api.github.com/repos/mozilla-firefox/firefox
- https://blog.mozilla.org/javascript/2014/07/21/slimmer-and-faster-javascript-strings-in-firefox/
- https://firefox-source-docs.mozilla.org/js/
- https://firefox-source-docs.mozilla.org/js/build.html
- https://github.com/mozilla-firefox/firefox
- https://spidermonkey.dev/
security posture
No protected-tool coverage found yet
No matching local secret-handling manifest was found for spidermonkey. Nucleus package metadata is still published here so future coverage has a stable package URL.
Install behavior
- No Homebrew bottle metadata was recorded.
Recommended review
Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.
executables
Installed executables
| Command | Kind | Exposure | Note |
|---|---|---|---|
js | executable | indexed executable | Discovered from the local executable index. |
js140 | executable | indexed executable | Discovered from the local executable index. |
js140-config | executable | indexed executable | Discovered from the local executable index. |
freshness
Version and freshness
These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.
page generated2026-08-03
manager version140.13.0
manager updated2026-07-21
local dataunknown
upstreamnot available
latest detectednot detected
- okNo freshness warnings were generated.
install metadata
Package metadata
| Package key | brew:spidermonkey |
|---|---|
| Version | 140.13.0 |
| Package manager | Homebrew |
| Homepage | https://spidermonkey.dev |
| Last updated | 2026-07-21T17:12:11Z |
| Pulse | updated |
| Bottle | not recorded |
| Service | none declared |
source database matches
Other package-manager records
Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.
MacPorts95%
spidermonkey
sudo port install spidermonkey- normalized package name match
- Matched by: Spidermonkey
pacman92%
js140 140.13.0-1
JavaScript interpreter and libraries - Version 140
sudo pacman -S js140- License: MPL-2.0
- Architecture: x86_64
- 6 dependencies
- installed executable or alias match
- Matched by: Js140
source trail
Generated from repository data
This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.
Combined YAML source
View the package source record on GitHub.
Used sources
- Geiger risk classifier
- cross-ecosystem install command graph
- curated package history
- external package-manager database matches
- pkg.so package database
- pkgdb category and tag curation