Bret Busby wrote:
Hello.
I am running
"
User agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101
Firefox/60.0 SeaMonkey/2.53.6
Build identifier: 20210118013008
"
on UbuntuMATE Linux 20.10.
Seamonkey does not allow ad blocking plugins like Adblock Plus and
Adblock Ultimate, etc, that are allowed by Firefox, and, a plugin name
"Bluehell Firewall" that apparently does ad blocking and tracking
blocking, is "not compatible with your version of Seamonkey.
The difference between "plugin" and "extension" is important. A plugin
is something that is installed as a stand-alone tool through the normal
software installation processes of your operating system, and then makes
itself available to run from inside Seamonkey. An extension is
something that's installed from inside the browser. As far as I'm
aware, the only plugin that Seamonkey 2.53.6 supports is Adobe Flash,
and I believe that the developers are planning to remove that support in
an upcoming version (perhaps as early as 2.53.7).
For extension problems, I believe that you're bumping into the Mozilla
architectural changes made to extensions handling. Those were
introduced with Firefox 2.55 (where 2.55 and 2.56 allowed for both old
and new), and since Firefox 57, only the newer structure is available in
Firefox.
The specific changes that happened were that Mozilla has shifted from
using the XUL API to WebExtensions, as used by Google Chrome. I haven't
actually tried it, but my understanding is that both Chrome and Firefox
can now run the same extensions. Thunderbird also supported both APIs
up until 78.0, but now supports only the newer WebExtensions.
With this development, Mozilla has removed all the older XUL extensions
from addons.mozilla.org. With the transition of Seamonkey (and
Thunderbird) away from Mozilla's support infrastructure, you can find
some extensions that work in Seamonkey at
https://addons.thunderbird.net/en-US/seamonkey/ .
If you take a look at the Release Notes at
https://www.seamonkey-project.org/releases/seamonkey2.53.6/ and go to
the Extensions section, there are notes about some of the most popular
extensions, particularly Enigmail, uBlock Origin, NoScript Classic, and
Session Manager, which include links to the most recent versions that
are working in Seamonkey.
As noted in a separate response, you can get access to a much wider
selection of XUL extensions by installing the Classic Addons Archive.
Why is Seamonkey blocking the ad blocking and he tracking blocking?
Make sure you're running extensions that are still compatible with
Seamonkey. The Release Notes explicitly note that AdBlock Plus does not
work well with Seamonkey, and recommend use of uBlock Plus, instead.
I will note that I do follow the notes from the Developers' regular
meetings, and that adding support for WebExtensions is intended, but
that it's a big enough undertaking for the limited number of
contributors, that that's not going to happen any time soon.
Smith
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