Connect Seafile and Collabora with the Correct WOPI URL
Enable secure document editing in Seafile by configuring Collabora’s discovery URL, HTTPS, and WOPI access for your deployment.
How to turn on and off the sound on Opera
Not supported as many services as Chorme , nor stable as Firefox , so Opera is not the most popular browser in the world. However, this browser still has changes and upgrades to serve its loyal customer base, one of which is the mute feature right on the tab in use.
Download Opera for iPhone, iPad
Download Opera for Windows Phone
In fact, this feature is completely similar to muting the web browser that Download.com.vn introduced earlier ( Safari also has this feature) and users only take 1 click to do this.
How to mute the sound in the Opera browser
How to do it is very simple, from the interface of Opera browser, right- click on the tab watching movies, listening to music ... select down the Mute tab .
Immediately the sound will be "mute" and we can see the speaker icon with a slash (the sound is disabled). To unmute it, just right-click on the tab and then left-click on the Unmute tab to finish!
In addition, Opera also allows to turn off the sound of other tabs on the page being used without hovering and that. By right-clicking on any tab, selecting Mute other tabs.
With the instructions above, hope you can use Opera better and who knows, this will be the browser will be installed on your computer by default instead of Internet Explorer or Coc Coc ?
I wish you successful implementation!
Restore Copy and Paste Between Collabora and Desktop Apps
Test the system clipboard, adjust browser permissions, and identify when an embedded Collabora integration needs an iframe policy change.
Make Custom Fonts Available in Collabora CODE Docker
Mount font files into Docker and Collabora’s systemplate so custom typefaces appear in the editor and render correctly in documents.
Restore Collabora CODE Settings Without Losing Deployment Changes
Back up coolwsd.xml and its deployment sources, restore them safely, and verify CODE before users return to editing.
Fix CODE’s WOPI Host Check by Matching the Host Origin
Allow the exact Nextcloud or other WOPI origin in CODE, then verify the active host allow-list and distinguish it from Nextcloud’s source-IP restriction.
Resolve Collabora’s “Well, This Is Embarrassing” Error
Trace Collabora’s browser, WOPI, and WebSocket connections to find why a document will not open, then apply the fix that matches your Nextcloud setup.
Run Collabora Online Across Kubernetes Nodes
Deploy Collabora CODE replicas with Helm, keep each document on one pod through WOPI affinity, and verify ingress, node placement, and Nextcloud editing.
Restore Collaboras WebSocket Connection Through the Proxy
Trace a failed socket handshake from browser to coolwsd, then match the reverse-proxy route to your Collabora version, including the CODE 26.04 Apache change.
Fix WOPI Proof Errors by Checking Keys, Discovery, and URLs
Trace Collabora WOPI proof failures to mismatched keys, stale discovery data, clock drift, or proxy URL changes—without weakening validation.
Fix a Misrendered Collabora Online Font Size Dropdown
Reset browser zoom, test a clean session, and identify when a malformed size menu needs a Collabora server update.