LEO Dictionaries version history - 10 versions
LEO Dictionaries by LEO GmbH
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 5.1.0
Released Aug 12, 2025 - 40.93 KBWorks with firefox 109.0a1 and laterYou can now use keyboard shortcuts for all dictionaries by LEO: select text on a website and use your defined shortcut to open LEOs dictionary with all possible translations.Source code released under GNU General Public License v3.0 only
Download Firefox and get the extensionYou'll need Firefox to use this extensionOlder versions
Version 5.0.1
Released Aug 11, 2025 - 40.69 KBWorks with firefox 109.0a1 and laterGive more options to set access keys to all dictionaries.
Layout improved in preferences. It's now easier to enable or disable certain language pairs.
Localization update for the name and description of the extensionSource code released under GNU General Public License v3.0 only
Version 3.4.2resigned1
Released Apr 25, 2024 - 39.43 KBWorks with firefox 57.0 and laterSource code released under GNU General Public License v3.0 only
Version 3.4.1
Released Jan 2, 2019 - 37.01 KBWorks with firefox 57.0 and laterSource code released under GNU General Public License v3.0 only
Version 3.4
Released Oct 26, 2018 - 37.01 KBWorks with firefox 57.0 and laterSource code released under GNU General Public License v3.0 only
Version 3.2.2
Released Mar 23, 2018 - 52.41 KBWorks with firefox 48.0 and later, android 48.0 to 68.*Source code released under GNU General Public License v3.0 only
Version 3.2.1
Released Mar 22, 2018 - 52.4 KBWorks with firefox 48.0 and later, android 48.0 to 68.*Source code released under GNU General Public License v3.0 only
Version 3.2
Released Mar 20, 2018 - 52.19 KBWorks with firefox 48.0 and later, android 48.0 to 68.*New feature:
When opening LEOs dictionaries in a new Tab and then closing that Tab again, go back to the original Tab.Source code released under GNU General Public License v3.0 only
Version 3.1
Released Jan 29, 2018 - 51.38 KBWorks with firefox 48.0 and later, android 48.0 to 68.*Source code released under GNU General Public License v3.0 only
Version 3.0
Released Sep 28, 2017 - 51.02 KBWorks with firefox 48.0 and later, android 48.0 to 68.*Source code released under GNU General Public License v3.0 only