Doesn't work in Firefox 55.0a1+ due to syntax error about addons_recent_updates

[tonymec]

AFAICT, it works. Install as follows (on Linux; for Windows the procedure is "similar but slightly different"):

1. Clone to your HD: I did it as follows:
   1a. mkdir -pv ~/.build/infocatcher
   1b. cd ~/.build/infocatcher
   1c. git clone -v https://github.com/Infocatcher/Addons_Recent_Updates.git
2. cd Addons_Recent_Updates
3. chmod -c a+x make.sh
4. ./make.sh
   -- A new xpi is created in the current directory.
5. Install that xpi (by means of the drop-down near top right of the Addons Manager)
6. Restart the browser.

Tested with:
UA:"Mozilla/5.0 (X11; Linux x86_64; rv:55.0) Gecko/20100101 Firefox/55.0 SeaMonkey/2.52a1"
ID:20170309003001 en-US
c-c:cdba3b908f7af12a31ed1eefc8c26ee69834a47e
m-c:19289cc8bf6ffce3b2067fbe91aebea5a356d008

[Infocatcher]

Signed "beta" version: https://addons.mozilla.org/addon/addons-recent-updates/versions/0.1.8pre
Release (not yet available, awaiting for review): https://addons.mozilla.org/addon/addons-recent-updates/versions/0.1.8 (Queue Position: 279 of 279, may be VERY slow...)

[tonymec]

I don't have access to this version 0.1.8 "release" at AMO ("We're sorry, but we can't find what you're looking for.") and I can only get at the 0.1.8pre by clicking the URL — otherwise the newest build I see at AMO is 0.1.7 — but a new commit appeared a few hours ago on my git clone (tagged 0.1.8) and I installed it as a matter of course. No issues so far ;-)

Signature checking seems disabled on SeaMonkey — ah, yes:

xpinstall.signatures.required    default    boolean    false

Probably because the ChatZilla and Lightning builds packaged with it (as well as the Modern theme I think) are not signed by AMO.

[Infocatcher]

I don't have access to this version 0.1.8 "release" at AMO

Yes, now will appears (for public) only after approval from AMO reviewers.
And this may take very long time (month or more): the review queue is very long.
Wow, already approved: https://addons.mozilla.org/addon/addons-recent-updates/versions/0.1.8