British Dictionary V3 for Firefox, Thunderbird and SeaMonkey. ********* WEBSITES ********* Website: www.proofingtoolgui.org (Proofing Tool GUI) Website: www.github.com/marcoagpinto/aoo-mozilla-en-dict (GitHub) Website: www.linkedin.com/in/marcoagpinto (LinkedIn) Software requirements (WebExtension): For both Firefox and Thunderbird, always try to have at least the latest ESR (Extended Support Release), which in July 2023 was version 115. Software requirements (Legacy Extension): For Firefox/Thunderbird 59 or below, use the .xpi, which I placed on GitHub. It is also intended for Firefox 61 and Thunderbird 61–64. https://github.com/marcoagpinto/aoo-mozilla-en-dict Look for the folder: “Extension - Firefox + Thunderbird + SeaMonkey (GB) (Legacy)” Click on the “Download” button to download the .xpi. ⚠ To enable the dictionary, right-click in an editable text area, select : “Languages” → “English (United Kingdom)”. Installing/downloading: To install add-ons, simply search for them from inside Firefox/Thunderbird. To install manually, using Firefox, right-click on the button “Add to Firefox” on this website, select “Save Link As” and install the downloaded .xpi file in: Tools → Add-ons and Themes → Extensions/Dictionaries → Install from file. (see the screenshot above) You may drag'n'drop the downloaded .xpi file into the Extensions/Dictionaries windows. Detailed installation/use instructions: https://proofingtoolgui.org/en_installing.html FAQ: https://proofingtoolgui.org/faq.html (read point #4 for issues) ⚠ FAQ (“movie”, “automobile”, “airplane”, “hardcover” and “bookstore”): https://proofingtoolgui.org/faq.html#7 The word “movie” was added on V2.57 since it is widely used. Changelog: https://proofingtoolgui.org/en_GB_CHANGES.txt About ize/ise: Some words can be written differently, like “online” and “on-line”. Oxford says some words are valid both ways; thus I kept both and the user decides which he prefers. For ize/ise, both are accepted in certain words. Oxford Dictionaries only refers that these accept both ize/ise for Premium accounts and not for regular users. Main difficulties developing this dictionary: 1) Proper names; 2) Possessive forms; 3) Plurals. EDIT: https://proofingtoolgui.org/faq.html#issue1 Adding new words: If you believe to have found a missing/incorrect word, please send it to me for analysis, via e-mail or GitHub. If it is in the Oxford or Collins dictionaries, I will add it. Removing US words: If you find Americanisms, which appear both in Oxford and Collins dictionaries as such with a British correspondence, please send them to me for analysis and removal. Archaic words: I will only add archaic words if they don't interfere with other words. Some literacy writing circles require these kinds of words. I developed Proofing Tool GUI (open-source tool) hoping someone would improve the GB speller using it, but months went by and no one volunteered, so I took the task myself in 2013. I have created the best up-to-date British speller. It encompasses several fields of knowledge, from simple to complex words. Furthermore, it is suitable as a basis for Commonwealth and European English. It doesn't matter your race, religion, gender, age or academic background, everyone should have access to all words equally free. To make sure the words I add are correct, I look for them in credible sources: 1) Oxford Dictionaries; 2) Collins Dictionary; 3) Macmillan Dictionary; 4) Cambridge Dictionary; 5) Merriam-Webster Dictionary (used with caution ⚠); 6) Wiktionary (used with caution ⚠); 7) Wikipedia (used with caution ⚠); 8) Physical dictionaries. In January 2015, I purchased an “Oxford Gold Account” to have a higher access to Oxford Dictionaries. On 25.Aug.2013 I released a “forked” British speller V2.00, which has been made available to OpenOffice/LibreOffice, Firefox, Thunderbird and SeaMonkey. So far, I have added 139 017+ words (as of V3.2.7). NOTICE: I have been publicly attacked regarding my dictionary, even in front of other developers. They only know how to criticise instead of suggesting words/fixes for the dictionary. There are millions of words, and I can't find them all by myself. This is a serious project, I have been paying out of my own pocket hundreds of EUR per year for web hosting, domains, premium account in Oxford Dictionaries, etc. so that people can enjoy quality work freely. Open-source is almost all I have left in life.