If you can reproduce this, can you go to Tools → Developer → Run JavaScript, run Zotero.openInViewer('about:memory'), click "Measure and save…" under "Save memory reports", and email the file

[JavaScript Error: "NS_ERROR_FAILURE: Couldn't decrypt string" {file: "jar:file:///opt/Zotero_linux-x86_64/omni.ja!/components/crypto-SDR.js" line: 179}]

JavaScript warning: resource://zotero/loader.jsm -> resource://zotero/bluebird/util.js, line 205: unreachable code after return statement

[JavaScript Error: "Translators not yet loaded"]

[JavaScript Error: "No tab with id: 55."]

Could you go to Tools → Developer → Run JavaScript and run the following, and let us know the result either here or via email to support@zotero.org with a link to this thread? (We'll respond here.)

[JavaScript Error: "TypeError: Error in invocation of browserAction.enable(optional integer tabId, optional function callback): Error at parameter 'tabId': Value must be at least 0.

[JavaScript Error: "No items returned from any translator"]

[JavaScript Error: "Error(s) encountered during statement execution: disk I/O error [QUERY: DELETE FROM fulltextWords WHERE wordID NOT IN (SELECT wordID FROM fulltextItemWords)] [PARAMS: ] [ERROR: dis

My ZOTERO shows this error: [JavaScript Error: "Missing host permission for the tab or frames" {file: "undefined"}]

They work fine, while in very accident case they behave strange. Some tests in the Run JavaScript Window when these behavior happens:

[JavaScript Error: "ID not provided" {file: "chrome://zotero/content/xpcom/connector/server_connector.js" line: 173}]

[JavaScript Error: "An error occurred" {file: "chrome://zotero/content/xpcom/sync/syncEngine.js" line: 1357}]

[JavaScript Error: "The connection was refused when attempting to contact wss://stream.zotero.org/."] [JavaScript Error: "WebSocket connection closed: 1006 "]

For this can you go into Tools -> Developer -> Run JavaScript, run this script and report the results back here? However, I am finding some compatibility issues with Word particularly whilst trying to

[JavaScript Error: "Error(s) encountered during statement execution: unable to open database file [QUERY: DELETE FROM itemTypesCombined] [PARAMS: ] [ERROR: unable to open database file]" {file: "chrom

I have invited two colleagues to join. Both of them have downloaded the application and attempted to register. They do not get the buttons. Both have Javascript working.

If those buttons aren't showing up, or aren't functioning, your browser or an extension may be blocking the javascript on the page from running.

[JavaScript Error: "Made no progress during upload -- stopping" {file: "chrome://zotero/content/xpcom/sync/syncEngine.js" line: 1416}]

JavaScript warning: resource://zotero/loader.jsm -> resource://zotero/bluebird/util.js, line 205: unreachable code after return statement