Nonfree Firefox WebExtensions

LanguageTool is a free and open-source grammar, style, and spell checker, and all its features are available for download. The LanguageTool website connects to a proprietary sister project called LanguageTool Premium (formerly LanguageTool Plus), which provides improved error detection for English and German, as well as easier revision of longer texts, following the open-core model.

1Password is a password manager developed by the Canadian software company AgileBits Inc. It supports multiple platforms such as iOS, Android, Windows, Linux, and macOS. It provides a place for users to store various passwords, software licenses, and other sensitive information in a virtual vault that is locked with a PBKDF2-guarded master password. By default, the user’s encrypted vault is hosted on 1Password’s servers for a monthly fee.

LastPass is a password manager application. The standard version of LastPass comes with a web interface, but also includes a browser extension, an app and support for bookmarklets.

Tampermonkey is a closed-source donationware userscript manager that is available as a browser extension. This software enables the user to add and use userscripts, which are JavaScript programs that can be used to modify web pages.

browser extension

American company operating a browser extension that applies coupons

browser plugin

iMacros was a browser-based application for macro recording, editing and playback for web automation and testing. It was provided as a standalone application and extension for Mozilla Firefox, Google Chrome, and Internet Explorer web browsers. Developed by iOpus/Ipswitch, it added record and replay functionality similar to that found in web testing and form filler software. The macros can be combined and controlled via JavaScript. Demo macros and JavaScript code examples were included with the software. Running strictly JavaScript-based macros was removed in later versions of iMacros browser e

TunnelBear is a public VPN service based in Toronto, Canada. It was created by Daniel Kaldor and Ryan Dochuk in 2011. In March 2018, TunnelBear was acquired by McAfee.

NewsGuard is a rating system for news and information websites. It is accessible via browser extensions and mobile apps. Their team of experts rates the websites' trustworthiness on a scale of 0 to 100, based on whether they adhere to editorial and journalistic standards. NewsGuard Technologies Inc., the company behind the tool, also provides services such as misinformation tracking and brand safety for advertisers, search engines, social media platforms, cybersecurity firms, and government agencies.