Really useful Add-on. Thank you very much!
I have one feature request: It would be nice to have the possibility to link to different JIRA-URLs depending on the ticket key. So you have one 'default' JIRA URL, but if the ticket starts with 'XYZ' it will link to another JIRA. We work with several versions, so I can use this nice addon only for one version in the current state.

Useful

Very handy, especially the right-click context menu action to go straight to a JIRA ticket.

The basic functionality of jumping to tickets works as advertised. Super useful and JIRA's biggest pain point fixed. In Chrome one can use this extension or setup a custom search engine as well.