one of the most important add-ons for me in Thunderbird is uBlock Origin
(which is one of the most popular add-ons for Firefox). It's way more
powerful than other blockers (like Adblock Plus) as its Dynamic Filtering
makes it possible to provide a very fine-grained control of what is
allowed in RSS feeds and HTML mails. As a result it is, e.g., very
effective in stopping email tracking.
The legacy version of uBlock Origin works well in Thunderbird 52.x but
obviously no longer in Thunderbird 60 beta (see
https://github.com/gorhill/uBlock/issues/3698). Unfortunately, its
author gorhill says that support for the legacy version for Thunderbird
will not happen (see
On the other hand according to
support is not yet available.
This leads to the unfortunate situation that the legacy version of uBO
will soon *no longer* work while the webextension version will *not yet*
work in Thunderbird.
So my question is: Can someone modify the legacy version to make it work
in TB 60? I know that Jörg has done this for some other add-ons -
perhaps he can step in here, too? This would be highly appreciated :-)
The latest legacy version is avialable from
https://github.com/gorhill/uBlock/releases as uBlock0.firefox.xpi.
Well, in oder to properly view RSS feeds or HTML mails you often
have to allow remote content.
In order to ensure that it is only allowed what is absolutely
necessary I have blocked everything (RED) in the global
column in Dynamic Filtering. In the local column only
those cells get a noop rule (GREY) which are necessary to
make the mail readable. I save those rules with the padlock for
every RSS feed and every sender from which I regularly get HTML
- Everything else (often 3rd party mail trackers) is still completely blocked regardless if there are corresponding rules in the filter lists.
- For those cells with noop rules existing rules from the filter lists (Easylist, EasyPrivacy etc.) are still applied.
The same basically is true for AdblockPlus. But one of the Eyeo
developers outright refused to work on this.
I'm not a developer, but given the version of the Adblock Plus extension
still working in TB52 already is an embedded web extension, I'd expect
no groundbreaking changes are needed to get it going again for TB60.
May be the TB council can approach Eyeo and try to convince them to
produce a working version for TB60?
Reading RSS feeds with TB from news sites is unbearable without an
Adblocker, as new browser tabs with 1-pixel images pop up all over the
Not having a working adblocker in TB60 also would be a kind of blow to
Thunderbird's reputation as an email client protecting a users privacy.
This isn't a made up scenario, even Bruce Schneier has commented on this
privacy issue not too long ago.
Yes this is just a quite annoying bug. Would be great if someone could
figure it out! https://bugzilla.mozilla.org/show_bug.cgi?id=524281
Even if this bug would be fixed, it wouldn't eliminate the need for a
working adblocker in Thunderbird.
The problem is, most extension developers who have moved on to
Webextensions show little or no enthusiasm to continue supporting their
extension for Thunderbird/Seamonkey.
I was under the impression that we have enough WebExtension support that
those add-ons will work.
Does the WE version of uBlock Origin not work?
We have only very basic support once the patches land. We get the
toolkit WX APIs for free, but for uBlock Origin we would still need at
least: content scripts, contextMenu, sidebar_action and possibly the