Summary

WebDAV launcher on Firefox doesn't work - "one of the following protocols (ms-word) isn't associated with any program"

Environment

• Operating System (client): Windows 10 Pro
• os build: 15063.608
• Web browser: Firefox 56.0 (32-bit), 56.0.1 (64-bit), 60.2.0
• Confluence version 6.3.3 (64bit Linux), 6.7.2 (64bit Linux)
• MS Office Professional 2010 version 14.0.6023.1000

Steps to Reproduce

1. Start Firefox web browser, login to Confluence
2. Upload any .doc or .docx document to any Confluence page. Save the page
3. Go to "..." -> -> Edit In Office ( choose .doc file created in previous step)
4. Install and configure webdav firefox addon according to Install the Firefox Add-On for the Office Connector

Expected Results

• Document will be opened in MS Word.

Actual Results

• Document will not be opened, following error message is displayed "Firefox doesn't know how to open this address, because one of the following protocols (ms-word) isn't associated with any program or is not allowed in this context.""

Comments

• Error will by thrown for other MS Office file formats as well (for example MS Excel .xls)
• It was possible on the same Environment to open/edit MS Office file when using Confluence 5.9.3

Workaround

• Use Internet Explorer 11