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(Created page with "This document is to clarify on the myriad of choices for loading extensions in Firefox and what will happen in [https://blog.mozilla.org/addons/2017/02/16/the-road-to-firefox-...")
 
(→‎Compatibility: Make the table easier to visually parse. Use rowspan and thicker horizontal borders for the types with multi-row entries, limit the width of the nightly etc. column)
 
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This document is to clarify on the myriad of choices for loading extensions in Firefox and what will happen in [https://blog.mozilla.org/addons/2017/02/16/the-road-to-firefox-57-compatibility-milestones/ Firefox 57]. There is [https://bugzilla.mozilla.org/show_bug.cgi?id=1336576 a bug for this]. This document expands it.
This document is to clarify on the myriad of choices for loading extensions in Firefox and what will happen in [https://blog.mozilla.org/addons/2017/02/16/the-road-to-firefox-57-compatibility-milestones/ Firefox 57] hits release and for each release past that (as far as we can see, things may change). There is [https://bugzilla.mozilla.org/show_bug.cgi?id=1336576 a bug for this]. This document expands it.


The main goal is prevent the running of legacy add-ons in Firefox Desktop release. None of the above applies to Android until we feel confident in the APIs available and apply similar changes to Android.
The main goal is prevent the running of legacy add-ons in Firefox Desktop and Android release. '''Update: All of the following apply to Android and Desktop.'''


Reference: [https://developer.mozilla.org/en-US/Add-ons/Install_Manifests#type  list of add-on types]
Reference: [https://developer.mozilla.org/en-US/Add-ons/Install_Manifests#type  list of add-on types]


== Compat. Table ==
== Compatibility ==


This is what things will look like when Firefox 57 hits release.
How things look with Firefox 57.0, and will look with subsequent releases (as far as we can see, things may change).
 
* Nightly builds: https://www.mozilla.org/firefox/nightly/all/
* Beta builds: https://www.mozilla.org/firefox/beta/all/
* Developer Edition builds: https://www.mozilla.org/firefox/developer/
* Release builds: https://www.mozilla.org/firefox/new/
* Unbranded builds: https://wiki.mozilla.org/Add-ons/Extension_Signing#Latest_Builds
 
Note: legacy add-ons didn't work with unbranded builds of Firefox 57 but this was fixed for Fx 58 by {{Bugzilla|1414450}}.


{| class="wikitable"
{| class="wikitable"
|-
|-
! Type !! Status !! Nightly, Aurora !! Beta, Release
! Type !! Status !! style="max-width: 15em;" | Nightly, Developer Edition, unbranded beta/release !! Beta, release
|-
|-
| WebExtension || Signed by AMO || YES || YES
| rowspan="4" | WebExtensions || signed by AMO || YES || YES
|-
|-
| || Signed as system || YES || YES
| signed by Mozilla internally || YES || YES
|-
|-
| || Unsigned || YES with pref || NO
| unsigned || YES with pref || NO
|-
|-
| || Unsigned loaded temporarily || YES || YES
| unsigned loaded temporarily || YES || YES
|- style="border-top: 2pt solid #aaa;"
| rowspan="4" | legacy extension (bootstrapped, overlay, XUL etc) || signed by AMO || YES with pref || NO
|-
|-
| Legacy Extension (bootstrapped, overlay, XUL etc) || Signed by AMO || YES with pref || NO
| signed by Mozilla internally || YES || YES
|-
|-
| || Signed as system || YES with pref || YES
| unsigned || YES with pref || NO
|-
|-
| || Unsigned || YES with pref || NO
| unsigned loaded temporarily || YES || NO
|- style="border-top: 2pt solid #aaa;"
| rowspan="4" | WebExtensions experiment || signed by AMO || YES || NO
|-
|-
| || Unsigned loaded temporarily || YES || NO
| signed by Mozilla internally || YES || YES
|-
|-
| WebExtension Experiment || Signed by AMO || YES || NO
| unsigned || YES with pref || NO
|-
|-
| || Signed as system || YES || YES
| unsigned loaded temporarily || YES || NO
|- style="border-top: 2pt solid #aaa;"
| rowspan="4" | new style static theme || signed by AMO || YES || YES
|-
|-
| || Unsigned || YES with pref || NO
| signed by Mozilla internally || YES || YES
|-
|-
| || Unsigned loaded temporarily || YES || NO
| unsigned || YES || YES
|-
|-
| New style static theme || Signed by AMO || YES  || YES
| unsigned loaded temporarily || YES || YES
|- style="border-top: 2pt solid #aaa;"
| rowspan="4" | telemetry experiments || signed by AMO || YES  || YES
|-
|-
| || Signed as system || YES || YES
| signed by Mozilla internally || YES || YES
|-
|-
| || Unsigned || YES || YES
| unsigned || YES with pref || NO
|-
|-
| || Unsigned loaded temporarily || YES || YES
| unsigned loaded temporarily || YES || YES
|- style="border-top: 2pt solid #aaa;"
| legacy lightweight theme || signed by AMO || YES || YES
|-
|-
| Telemetry Experiments || Signed by AMO || YES  || YES
| complete themes || any combination || NO || NO
|-
|-
| || Signed as system || YES || YES
| multiple item package || any combination || NO  || NO
|-
|-
| || Unsigned || YES with pref || YES
| language pack || any combination || YES || YES
|-
|-
| || Unsigned loaded temporarily || YES || YES
| dictionaries || any combination || YES || YES
|-
|-
| Legacy lightweight theme || Signed by AMO || YES  || YES
|}
 
== Nightly leading up to Firefox 57 ==
 
To assist with performance analysis leading up Firefox 57, in '''Nightly only''' we are turning off add-ons that require shims. For more information please see [https://wiki.mozilla.org/Add-ons/ShimsNightly shims on nightly]. The pref will '''default to false'''.
 
{| class="wikitable"
|-
|-
| Complete Themes || Any combination || NO  || NO
! Type !! Status !! Nightly !! Beta, Release
|-
|-
| Multiple item package || Any combination || NO  || NO
| WebExtension || || YES || YES
|-
|-
| Language Pack || Any combination || YES || YES
| Legacy Extension (bootstrapped, overlay, XUL etc) || MPC=true || YES || YES
|-
|-
| Dictionaries || Any combination || YES || YES
| || MPC=false || YES with pref || YES
|-
| || MPC not stated || YES with pref || YES
|-
|-
|}
|}
An extension must pass both tests to run. Example:
* A XUL overlay extension that is signed by Mozilla and is MPC=false, *will not run* on nightly unless the user changes the pref.
* A XUL overlay extension this is signed by AMO and is MPC=true, *will run* on nightly.
* A WebExtension that is unsigned *will run* on nightly but not on release.
== Testing signed extensions ==
If you've got a signed extension, unzip it and cd into the META-INF directory inside the extension.
Testing an extension:
  wget https://addons.mozilla.org/firefox/downloads/file/743932/sort_tabs_by_url-0.10-an+fx.xpi
  unzip sort_tabs_by_url-0.10-an+fx.xpi 
  cd META-INF
  openssl pkcs7 -inform DER -text -print_certs < mozilla.rsa | grep "Issuer" -m 1
The output will look like the following.
An AMO signed extension:
  Issuer: C=US, O=Mozilla Corporation, OU=Mozilla AMO Production Signing Service, CN=production-signing-ca.addons.mozilla.org/emailAddress=services-ops+addonsigning@mozilla.com```
== Prefs ==
To enable things on Nightly some prefs must be flipped:
* For unsigned the appropriate [https://wiki.mozilla.org/Add-ons/Extension_Signing signing pref] '''xpinstall.signatures.required''' must be flipped.
* For legacy add-ons the '''extensions.legacy.enabled''' pref must be flipped.
* For non-MPC add-ons '''extensions.allow-non-mpc-extensions''' pref must be flipped.


== Notes ==
== Notes ==


* Nightly and Aurora will need to flip prefs
* AMO will stop signing legacy add-ons for version of Firefox greater than 57. Old signed add-ons will remain on servers and people's hard drives, so although AMO will stop signing them, we still need an explicit block in Firefox to prevent them loading.
** For unsigned the appropriate [https://wiki.mozilla.org/Add-ons/Extension_Signing signing pref] must be flipped.
* "Signed by Mozilla internally" refers to add-ons signed internally and might include Test Pilot, Shield and other add-ons.
** For legacy add-ons the appropriate pref must be flipped.
** Both of these will default to false.
* AMO will stop signing legacy add-ons for version of Firefox greater than 57, but old signed add-ons will remain around.
* "Signed as system" refers to add-ons signed internally and might include Test Pilot, Shield and other add-ons.
* If we support loading unsigned temporarily, it’s assumed we load signed temporarily too.
* If we support loading unsigned temporarily, it’s assumed we load signed temporarily too.
== Updates ==
* Removed Aurora from this chart.
* Added in the Nightly MPC=True changes.
Kwan
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