Support for Thunderbird 24.x ESR has ended and there will no longer be any further Thunderbird ESR releases. Starting with Thunderbird 31.x, Mozilla is basing the mainstream Thunderbird releases off of the Firefox ESR standards, so Thunderbird ESR releases have been merged into the mainstream Thunderbird releases. This means the mainstream releases will be stable for about one year before a major update is released. Click here for more information.

Bug 1044336 involves Thunderbird 31 and the Insert Link function. Users while composing a message are unable to paste via right-click into the Link Location field within the Link Properties box when using the Insert Link function. Users are getting the message no named anchors or headings in this page when they attempt to right-click in the Link Location field. User can still paste via they keyboard shortcuts CTRL+V or SHIFT+Insert. At this time there has not been much happening in regards to this bug so doubtful this will be resolved in time for the upcoming Thunderbird 31.1.0 release early next month.