This option can also be changed by adjusting the preference from about:config. If multiprocess is not available, this option will not be shown.

This an option which is under the 'General' tab as 'Enable multi-process Firefox. This can be done from the about:preferences page (also available from Tools➞Options). Thus, to use Firebug in newer versions of Firefox, you will need to disable Firefox from entering multiprocess mode.

Using Firebug in newer versions of Firefox Firefox automatically enabling multiprocess mode will depend on multiple factors, including what other add-ons are installed in the profile. The fact that Firebug does not actually work in multiprocess Firefox will account for different people having different experiences with Firebug working or not working in a particular version of Firefox. You will be able to disable e10s for a while to keep using Firebug 2, but this won’t last forever. e10s) and converting it is too complex, so it will stop working when e10s is activated in Firefox. They also direct you to read: Unifying Firebug & Firefox DevToolsįirebug 2 doesn’t work in multi-process browsers (i.e. Firebug will then only assist the user with migration to Firefox’s built-in tools. When opened in a multi-process Firefox, Firebug’s tools cannot be used. This way Firebug can help users to easily migrate into built-in Firefox developer tools – in case it’s running in multi-process enabled browser. The extension is marked as multi-process (e10s) compatible so, it isn’t blacklisted and users can continue installing it. However, it also explains that :įirebug 2.0.18 fixes issue 8030.

You can disable updates for Firefox Developer edition.įirebug does not work with multiprocess Firefoxįirebug 2.0.18 is compatible with Firefox 30 – 52 Here you can find all Firebug installations

Now you can go at the Firebug repository and install desired version.

NOTE: The Multi-process architecture improves the browser's stability, performance and security by separating tasks into processes, you disabling it at own responsibility.Īfter that you need to restart the browser. Run Firefox developer edition after installing and go to the about:config (type in url bar)įind ( set to false) I manage to get Firebug work again, so here is what I done.Įveryone knows that Firebug isn't being developed or maintained any longer because it can't work with e10s, so here is my workaround:ĭownload Firefox Developer edition so you can allow XPI installation.į64.installer.exe or

Firebug download for firefox 30