Bug fixes

Fixed: the welcome page was not shown on first install. The onInstalled listener was incorrectly placed in the popup script rather than the background script, so it never fired.
Fixed: context menu items (right-click search) could throw "duplicate ID" errors after the service worker restarted. Menu registration now uses removeAll() before re-creating items, as required by the MV3 service worker lifecycle.
Fixed: the Get Access button could produce a broken redirect URL when the current page URL contained query parameters or special characters. The URL is now correctly percent-encoded before being passed to the EZproxy login.
Fixed: the Firefox welcome page navbar toggler had a broken reference to bootstrap.bundle.min.js, a file that was not included in the Firefox build. The navbar toggle now works correctly.

Search engine updates

Updated the Leiden University Catalogue URL to the new NDE discovery interface (catalogue.leidenuniv.nl/nde/search). All UTM tracking parameters are preserved.
Aligned the Web of Science context menu URL with the URL already used by the popup search (EZproxy rewritten domain).

Third-party libraries

Removed the bundled Bootstrap JavaScript file entirely. The only Bootstrap JavaScript functionality used (navbar collapse toggle) has been replaced with a small vanilla JavaScript equivalent. This eliminates the UNSAFE_VAR_ASSIGNMENT (innerHTML) linter warnings that originated from the Bootstrap bundle.
Bootstrap CSS updated to 5.3.7.

Accessibility

Validation alert regions changed to aria-live="assertive" so screen readers announce errors immediately when a search is submitted with an empty field or no engine selected.
Corrected type="submit" to type="button" on the Search and Get Access buttons, which are not inside a <form> element.

We have updated the URLs of our University EZproxy Servers (https://www.oclc.org/en/ezproxy.html)
Added ARIA labels for accessibility.
Performance optimizations.
Updated to Bootstrap 5.3.

Hotfix

Welcome version 3.1!

We are laying the foundations for our next release and improving the "Welcome page". There's also some work under the hood to make this plugin even better.