Add-ons/Firefox57
< Add-ons
Jump to navigation
Jump to search
This document is to clarify on the myriad of choices for loading extensions in Firefox and what will happen in Firefox 57. There is a bug for this. This document expands it.
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: list of add-on types
Compat. Table
This is what things will look like when Firefox 57 hits release.
| Type | Status | Nightly | Beta, Release |
|---|---|---|---|
| WebExtension | Signed by AMO | YES | YES |
| Signed by Mozilla internally | YES | YES | |
| Unsigned | YES with pref | NO | |
| Unsigned loaded temporarily | YES | YES | |
| Legacy Extension (bootstrapped, overlay, XUL etc) | Signed by AMO | YES with pref | NO |
| Signed by Mozilla internally | YES | YES | |
| Unsigned | YES with pref | NO | |
| Unsigned loaded temporarily | YES | NO | |
| WebExtension Experiment | Signed by AMO | YES | NO |
| Signed by Mozilla internally | YES | YES | |
| Unsigned | YES with pref | NO | |
| Unsigned loaded temporarily | YES | NO | |
| New style static theme | Signed by AMO | YES | YES |
| Signed by Mozilla internally | YES | YES | |
| Unsigned | YES | YES | |
| Unsigned loaded temporarily | YES | YES | |
| Telemetry Experiments | Signed by AMO | YES | YES |
| Signed by Mozilla internally | YES | YES | |
| Unsigned | YES with pref | NO | |
| Unsigned loaded temporarily | YES | YES | |
| Legacy lightweight theme | Signed by AMO | YES | YES |
| Complete Themes | Any combination | NO | NO |
| Multiple item package | Any combination | NO | NO |
| Language Pack | Any combination | YES | YES |
| Dictionaries | Any combination | 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 shims on nightly. The pref will default to false.
| Type | Status | Nightly | Beta, Release |
|---|---|---|---|
| WebExtension | YES | YES | |
| Legacy Extension (bootstrapped, overlay, XUL etc) | MPC=true | 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.
Notes
- Nightly will need to flip prefs
- For unsigned the appropriate signing pref must be flipped.
- For legacy add-ons the extensions.legacy.enabled 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. 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.
- "Signed by Mozilla internally" 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.
Updates
- Removed Aurora from this chart.
- Added in the Nightly MPC=True changes.