More recent changes to the Zotero Word Proccessor plugins are described in the main Zotero changelog.
Zotero Word for Windows Integration
Changes in 3.5.2 (September 25, 2015)
Eliminate dynamic toolbar functionality for Word 2007 and later introduced in 3.5.1. The Insert Citation button has been replaced with an Add/Edit Citation button.
Clicking Add/Edit Citation when immediately adjacent to a citation now edits that citation instead of creating a new one.
Changes in 3.5.1 (September 20, 2015)
Add Zotero tab to ribbon and improve appearance in Word 2007 and later.
Word 2016 compatibility.
Remove XPCOM binary components.
Fix a bug that interfered with selection highlighting.
Signed by Mozilla.
Changes in 3.5.0
Zotero Word for Windows Integration 3.5.0 was not publicly released.
Changes in 3.1.20 (June 30, 2015)
Rewrite of Word for Windows plugin to use js-ctypes. This is enabled only for Firefox 40 and later, which no longer support XPCOM binary components. Previous versions of Firefox continue to use the old XPCOM-based plugin.
Localized installation preference pane.
Fixed an issue where error dialogs may not appear during installation.
Firefox 39 (and later) compatibility.
Changes in 3.1.19 (March 6, 2015)
Changes in 3.1.18 (January 14, 2015)
Changes in 3.1.17 (September 2, 2014)
Changes in 3.1.16 (April 29, 2014)
Fixed a bug editing the first footnote citation in a document when there are also in-text citations present.
Firefox 29, 30, and 31 compatibility.
Changes in 3.1.15 (December 8, 2013)
Changes in 3.1.14 (October 29, 2013)
Changes in 3.1.13 (June 23, 2013)
Changes in 3.1.12 (March 23, 2013)
Changes in 3.1.11 (February 19, 2013)
Changes in 3.1.10 (January 26, 2013)
Changes in 3.1.9 (November 16, 2012)
Changes in 3.1.8 (July 21, 2012)
Changes in 3.1.7 (May 9, 2012)
Fixed restoration of “Final” view in Word 2010.
Use locale-specific bibliography style name in Word 2007+.
Move insertion point past footnote references upon insert.
Firefox 13 and 14 compatibility.
Changes in 3.1.6 (March 17, 2012)
Changes in 3.1.5 (January 30, 2012)
Changes in 3.1.4 (November 10, 2011)
Changes in 3.1.3 (November 8, 2011)
Firefox 7, 8, and 9 compatibility.
Zotero 3.0b3 compatibility.
Compatibility with track changes.
Fixed an issue editing the first footnote in a document.
Changes in 3.1.2 (August 14, 2011)
Changes in 3.1.1 (June 20, 2011)
Changes in 3.1 (April 1, 2011)
Changes in 3.1b1 (January 14, 2011)
Changes in 3.0b1 (October 29, 2010)
Fixed “Call was rejected by callee” error.
Fixed “That property is not available on that object” error.
Fixed “The command is not available because no document is open” error.
Changes in 3.0a4 (June 14, 2010)
Changes in 3.0a3 (November 14, 2009)
Changes in 3.0a2 (September 23, 2009)
Added compatibility with Namoroka, Flock, and Minefield.
Improved error handling.
Fixed compatibility with very old versions of Windows.
Fixed installation when Word Startup folder has been moved.
Don't show conversion dialog when inserting citations and bibliography.
Changes in 3.0a1 (September 15, 2009)
Zotero Word for Mac Integration
Changes in 3.5.12 (August 31, 2015)
Changes in 3.5.11 (July 15, 2015)
Changes in 3.5.10 (July 14, 2015)
Changes in 3.5.9 (July 13, 2015)
Changes in 3.5.8 (July 13, 2015)
Changes in 3.5.7 (March 23, 2013)
Fixed an issue where citations could remain superscripted when switching from a superscript citation style to another citation style.
Fixed an installation error if the Word Startup folder is not readable by the current user.
Throw a more explicit error if Word is missing AppleScript support due to an unfortunate interaction between Migration Assistant and Office 2008.
Zotero 4.0 compatibility.
Changes in 3.5.6 (November 16, 2012)
Improved error message when Visual Basic for Applications is not installed in Word 2011.
Fixed errors when the user switched documents while a citation was being inserted.
Fixed a small memory leak.
Now throws an error if the user deletes fields from the document while an update is in progress instead of shifting field codes.
Changes in 3.5.5 (July 7, 2012)
Fixed several issues converting among in-text citations, footnotes, and endnotes.
Fixed several issues using bookmarks.
Fixed an issue inserting a second citation into a table cell.
Changes in 3.5.4 (May 1, 2012)
Fixed a bug in the installation process that would cause Firefox to crash if Word was not installed.
Fixed a bug in the installation process that could cause Firefox to create a separate process that would hang while consuming system resources.
Fixed inserting an in-text citation into a note in Word 2004.
Fixed inserting rich text citations and bibliographies when using bookmarks.
Changes in 3.5.3 (April 15, 2012)
Changes in 3.5.2 (March 19, 2012)
Fixed an issue editing citations in footnotes in Word 2008.
Fixed an issue adding a second citation to a footnote in Word 2008.
Fixed removing field codes.
Workaround for Word scripts not updated since Zotero Word for Mac Integration 3.0b3.
Changes in 3.5.1 (March 16, 2012)
Fixed an issue inserting in-text citations into footnotes.
Fixed an issue inserting footnote citations in Word 2008.
Fixed an installation issue on systems with case-sensitive file systems.
Changes in 3.5 (March 12, 2012)
Changes in 3.1.10 (January 30, 2012)
Firefox 10 compatibility.
Fixed an issue that could cause errors when using Track Changes.
Fixed an issue that could cause errors when switching citation styles.
Changes in 3.1.9 (November 9, 2011)
Changes in 3.1.8 (November 9, 2011)
Fixed “Unknown property, element or command: 'show_insertions_and_deletions'” error with Word 2004
Fixed an error converting between in-text styles and footnote styles
Changes in 3.1.7 (November 8, 2011)
Firefox 9 compatibility.
Zotero 3.0b3 compatibility.
Compatibility with track changes.
Ask the user to authenticate if permissions for Word Startup folder are inadequate.
Changes in 3.1.6 (August 14, 2011)
Changes in 3.1.5 (July 21, 2011)
Changes in 3.1.4 (July 20, 2011)
Changes in 3.1.3 (June 20, 2011)
Changes in 3.1.2 (April 1, 2011)
Changes in 3.1.1 (March 22, 2011)
Changes in 3.1 (March 18, 2011)
Show incompatibility warning when run with Firefox 4 under Mac OS X 10.5.
Automatically install in French, Spanish, Italian, and German versions of Word.
Fixed incorrect text coloring when text is not black.
Fixed component loading error on some systems when running Firefox 4.
Always use included appscript module.
Changes in 3.1b2 (January 19, 2011)
Changes in 3.1b1 (January 14, 2011)
Changes in 3.0b7 (December 2, 2010)
Changes in 3.0b6 (December 1, 2010)
Changes in 3.0b5 (October 30, 2010)
Changes in 3.0b4 (October 29, 2010)
Direct AppleScript calls to running Word instance.
Fixed installation errors.
Fixed an error when inserting text containing entities specified in the editor that cannot be expressed as MacRoman.
Changes in 3.0b3 (June 26, 2010)
Fixed an issue that could cause error messages not to appear when they contain accented characters.
Work around an obscure AppleScript bug that could prevent Zotero Mac Word Integration from installing without a restart.
Changes in 3.0b2 (March 28, 2010)
Changes in 3.0b1 (March 20, 2010)
Changes in 3.0a9 (March 11, 2010)
Changes in 3.0a8 (February 3, 2010)
Changes in 3.0a7 (November 14, 2009)
Changes in 3.0a6 (November 6, 2009)
Fixed an issue with missing field codes.
Fixed an issue with non-English disk names.
Don't show conversion dialog when inserting citations and bibliography.
Changes in 3.0a5 (September 21, 2009)
Upgrade bundled appscript to 0.20.
Fixed installation issues on non-English language systems
Fixed “Application could not handle this command” error.
Changes in 3.0a4 (September 17, 2009)
Changes in 3.0a3 (September 17, 2009)
Changes in 3.0a2 (September 16, 2009)
Changes in 3.0a1 (September 15, 2009)
Zotero LibreOffice Integration
Changes in 3.5.10 (August 31, 2015)
Changes in 3.5.9 (March 11, 2014)
Changes in 3.5.8 (August 17, 2013)
Changes in 3.5.7 (July 22, 2013)
3.5.7 was released for Zotero Standalone only
Changes in 3.5.6 (March 23, 2013)
Changes in 3.5.5 (February 19, 2013)
Fixed superscripted styles in LibreOffice versions before 4.0 (broken since 3.5.4).
Fixed extraneous whitespace around footnote and superscripted citations under Windows (since 3.5.4).
Fixed handling of empty ReferenceMarks.
Changes in 3.5.4 (February 7, 2013)
Changes in 3.5.3 (July 4, 2012)
Improved performance.
Fixed bustage if a Java error occurs.
Added common LibreOffice 3.6 paths.
Warn if “Unstable Features” is enabled in LibreOffice preferences.
Prompt to install Java on Windows if it is not installed.
Changes in 3.5.2 (February 8, 2012)
Changes in 3.5.1 (February 2, 2012)
Changes in 3.5 (January 30, 2012)
Changes in 3.5b3 (December 22, 2011)
Changes in 3.5b2 (November 8, 2011)
Changes in 3.5b1 (August 14, 2011)
Firefox 6 compatibility.
Zotero 3.0b1 compatibility.
Improved installer's ability to find unopkg on Windows.
Fixed manual selection of unopkg location.
Changes in 3.5a2 (June 20, 2011)
Changes in 3.5a1 (March 14, 2011)
Java component now loads in OpenOffice.org instead of in browser.
Fixed all known Java-related errors.
Improve installation process.
Changes in 3.1b1 (January 14, 2011)
Changes in 3.0b3 (February 10, 2011)
Changes in 3.0b2 (October 29, 2010)
Changes in 3.0b1 (October 29, 2010)
Implement footnote indexing for numbered citations. Zotero references will no longer use “Ibid.” when the preceding footnote is user-generated.
Added support for citations within tables.
Fixed a bug that could cause all text following a bibliography to be erased when the bibliography was updated.
Changes in 3.0a8 (June 14, 2010)
Changes in 3.0a7 (March 11, 2010)
Changes in 3.0a6 (January 23, 2010)
Changes in 3.0a5 (October 14, 2009)
Changes in 3.0a4 (September 30, 2009)
Changes in 3.0a3 (September 23, 2009)
Improve automatic recognition of OpenOffice.org paths.
Added compatibility with Namoroka, Flock, and Minefield.
Added compatibility with the IcedTea/OpenJDK OJI Java plugin on Linux.
Changes in 3.0a2 (September 16, 2009)
Changes in 3.0a1 (September 15, 2009)