Be careful with old versions! These versions are displayed for testing and reference purposes.You should always use the latest version of an add-on.
Latest version
Version 3.2.0
Released Apr 9, 2024 - 3.26 MBWorks with firefox 42.0 and laterWe added a new feature: Buttercup input button customisation. We also fixed a couple of bugs, like some input fields not being filled correctly and the save-credentials prompt showing for already-existing items.Source code released under MIT License
Download Firefox and get the extensionYou'll need Firefox to use this extensionOlder versions
Version 3.1.0
Released Mar 27, 2024 - 3.21 MBWorks with firefox 42.0 and laterWe've added in some missing features that were neglected in our v3 release, such as entry info dialogs and the ability to copy values from the menu. We've also fixed several critical issues such as the recognition of invalid login forms, bad OTP URIs crashing the application and a broken search interface for entries when first loading the addon.Source code released under MIT License
Version 3.0.0
Released Mar 26, 2024 - 3.21 MBWorks with firefox 42.0 and laterV3 of Buttercup for browsers drastically improves how the extension integrates with web pages, allowing for easier logins and more login form styles recognised. It now supports nested iframes, OTP submissions and persisted login state between updates.
This new major release does require the Buttercup desktop application to be installed - you can find this at https://buttercup.pw.Source code released under MIT License
Version 2.26.0
Released Nov 8, 2023 - 2.09 MBWorks with firefox 42.0 and laterWe've updated our core libraries, including connectors for Dropbox and Google Drive. This should improve stability.
This release also comes with a notice regarding our new major application version, which is due very soon.Source code released under MIT License
Version 2.25.3
Released Jan 31, 2023 - 2.16 MBWorks with firefox 42.0 and laterFixed a Google Drive authentication bug preventing expired auth tokens from being updated.Source code released under MIT License
Version 2.25.2
Released Sep 3, 2022 - 2.16 MBWorks with firefox 42.0 and laterWe've fixed connectivity bugs in both our Google Drive and Dropbox connectors.Source code released under MIT License
Version 2.25.1
Released Aug 16, 2022 - 2.16 MBWorks with firefox 42.0 and laterFixed a number of bugs for the new vault format, Format B. Migration to this new vault format will be made possible via the desktop application in the coming days. Updating to this addon version is advised before doing so.Source code released under MIT License
Version 2.25.0
Released Jun 2, 2022 - 2.16 MBWorks with firefox 42.0 and laterWe've updated our core library to improve the performance and stability of Buttercup, especially while using Dropbox or Google Drive to connect your vaults. We've made some other internal changes to improve our upcoming transition to our new vault format, which will happen automatically over time.
Some small changes to the user interface have also been added in this release.Source code released under MIT License
Version 2.24.3
Released May 24, 2021 - 1.76 MBWorks with firefox 42.0 and laterWe've fixed a small layout bug on the unlock-vaults screen.Source code released under MIT License
Version 2.24.2
Released May 22, 2021 - 1.76 MBWorks with firefox 42.0 and laterCritical core bug fixes (stability), along with some search-released bug fixes.Source code released under MIT License
Version 2.24.1
Released Jan 6, 2021 - 1.78 MBWorks with firefox 42.0 and laterWe've fixed a bug with our Copy functionality in popup dialogs.Source code released under MIT License
Version 2.24.0
Released Dec 9, 2020 - 1.78 MBWorks with firefox 42.0 and laterWe've made some performance improvements (searching, unlocking and saving), and have enabled icons in the search results in-page.Source code released under MIT License
Version 2.23.1
Released Nov 27, 2020 - 1.78 MBWorks with firefox 42.0 and laterWe've greatly improved search performance, so there should be much less in the way of lag or delay when opening the Buttercup entry menus.Source code released under MIT License
Version 2.23.0
Released Sep 5, 2020 - 1.78 MBWorks with firefox 42.0 and laterWe fixed an issue with Google Drive not refreshing authentication when unlocking vaults after some time. We've also removed the nagging popup asking for a choice on the dynamic icon feature - we now default this to enabled.Source code released under MIT License
Version 2.22.0
Released Sep 4, 2020 - 1.78 MBWorks with firefox 42.0 and laterWe've fixed a critical performance bug that occurs after leaving vaults unlocked for some time - sorry about that! This new version should be much kinder to your computer :)Source code released under MIT License
Version 2.21.0
Released Aug 30, 2020 - 1.78 MBWorks with firefox 42.0 and laterWe've upgraded the core of our password manager, improving stability and performance. You'll notice new dynamic icons on entries as well. We also fixed a few bugs :)Source code released under MIT License
Version 2.20.2
Released Aug 19, 2020 - 14.05 MBWorks with firefox 42.0 and laterFixed a critical performance bug where vaults would grow to an unusably-large size. Saving your vault under this version will drastically reduce vault size and improve overall performance.Source code released under MIT License
Version 2.20.1
Released Aug 3, 2020 - 14.05 MBWorks with firefox 42.0 and laterWe've added attachments for My Buttercup vaults!Source code released under MIT License
Version 2.20.0
Released Aug 3, 2020 - 14.05 MBWorks with firefox 42.0 and laterWe've added support for attachments (My Buttercup vaults), as well as fixing several performance-related issues in the core.Source code released under MIT License
Version 2.19.0
Released Jul 25, 2020 - 13.93 MBWorks with firefox 42.0 and laterWe've improved the Buttercup login-form button so that it works better with more login forms and websites.Source code released under MIT License
Version 2.18.0
Released Jul 7, 2020 - 13.93 MBWorks with firefox 42.0 and laterSearch has been upgraded so that trashed items no longer show up. The save-login prompt will also not show if you login using a saved entry.Source code released under MIT License
Version 2.17.0
Released Jul 5, 2020 - 13.92 MBWorks with firefox 42.0 and laterWe've rebuilt our search functionality so that it's faster and more accurate, so you can find what you're looking for immediately.Source code released under MIT License
Version 2.16.2
Released Jul 2, 2020 - 13.91 MBWorks with firefox 42.0 and laterFixed a bug with entering username/password details into forms.Source code released under MIT License
Version 2.16.1
Released Jul 1, 2020 - 13.91 MBWorks with firefox 42.0 and laterFixed some bugs with searching, saving new credentials and detecting vault state in some menus. Sorry about that!Source code released under MIT License
Version 2.16.0
Released Jun 30, 2020 - 13.91 MBWorks with firefox 42.0 and laterYou can now connect your My Buttercup account in the extension. You can also add localhost to the list of disabled prompt domains.Source code released under MIT License