Checklist
debian/control
ensure mozilla-devscripts (>= 0.16~) is used
- ensure that ${xpi:Recommends} is used instead of ${xpi:Depends} and be sure to add it under Recommends: field.
- ensure that no packages (browsers / mail clients) are in Depends: cause ${xpi:Recommends} will do the trick for us
- ensure that Standards-Version 3.8.3 is used.
- remove unzip from Build-Depends, if there is no direct unzip call in debian/rules
- remove zip from Build-Depends, if there is no direct zip call in debian/rules
- ensure that all binary packages depend on ${misc:Depends}
ensure that the Maintainer field is up-to-date: use "Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>" instead of "Ubuntu MOTU Developers <ubuntu-motu@lists.ubuntu.com>"
- add "Vcs-Bzr: lp:~ubuntu-dev/firefox-extensions/$extensionname.ubuntu" if not already done
add "Vcs-Browser: https://code.launchpad.net/~ubuntu-dev/firefox-extensions/$extensionname.ubuntu" if not already done
- add "Provides: ${xpi:Provides}" and "Enhances: ${xpi:Enhances}"
debian/rules
- remove MOZ_EXTENSION_PKG, if it is the first binary package in debian/control
- remove MOZ_XPI_EMID - if the extension does not show up in Firefox/Thunderbird, it is a bug in mozilla-devscipts (${xpi:Depends} will not work then, too)
- remove MOZ_XPI_BUILD_COMMAND, if it only calls med-xpi-pack
- remove all comments from the template and the unused variables
- check if removing MOZ_XPI_DOCUMENTED_LICENSE_FILES have the same results (it will be guessed then)
Other
- ensure that you add reference to this wiki page in debian/changelog.
- verify that the extension works with ffox 3.5
- check debian/*install and debian/*links files; they can be removed in the most cases
- ensure that the extension do *not* ship an extra license file. Make use of MOZ_XPI_DOCUMENTED_LICENSE_FILES feature to remove them eventually.
- check lintian (run it with "-iIE --pedantic" flags)
- you may switch to debhelper 7
- check the build log, if xpi:Recommends, xpi:Provides, and xpi:Enhances are set correctly
- when done ensure you push the branch to lp:~mozilla-extensions-dev/firefox-extensions/$extensionname.ubuntu
Plans for lucid (Ubuntu 10.04)
The preferred way is to get the changes into Debian first and sync them into Ubuntu (or merge if transitional packages are required). The changes are delayed to lucid, because renamed packages must go through the NEW queue and we are already in a feature freeze.
- ensure that the source package does not starts with "mozilla-", "firefox-", "thunderbird-", or "ice*-" (example: use pwdhash instead of mozilla-pwdhash)
ensure that the binary package is called "xul-ext-<source_name>" (example: xul-ext-pwdhash is the binary package for pwdhash). Source: Policy for packaging extensions for XUL based applications
- if you rename the binary, create a transitional package with the old name, which only depends on the new one
9.10 Karmic Koala Package's list
Use the following: 
for "DONE" OR 
for "OUTSTANDING"
Package
Branch
Has ${xpi:Depends}
No packages in Depends
Has correct Recommends
Bugs filed
No extra license files
Works with ffox3.5
Removed M_E_P
Assignee
Version
bindwood
asac (done)
0.4.1-0ubuntu2
firebug
gnomefreak
adblock-plus
gnomefreak
1.1.1-0ubuntu3
mozgest
gnomefreak
2.1.4-3ubuntu1
chatzilla
asac (done)
flashblock
gnomefreak andv
ubuntu-it-menu
gnomefreak andv
greasemonkey
gnomefreak
firefox-showcase
gnomefreak
mozilla-ctxextensions
gnomefreak
mozilla-imagezoom
gnomefreak
mozilla-stumbleupon
gnomefreak
long-url-please
andv
pwdhash
bdrung
1.7-5ubuntu1
mozvoikko
firefox-sage
gnomefreak
flashgot
gnomefreak
linkwidgets
firegpg
mozilla-livehttpheaders
speeddial
useragentswitcher
all-in-one-sidebar
bugmail-extension
foxyproxy
gears
ubufox
webfav