DevTools/Fission

About

DevTools support for cross-site iframes with Fission is in progress and this page summarizes the current state.

The DevTools team is listening in in the #devtools:mozilla.org room on Mozilla's Matrix server.

Instructions for enabling Fission for DevTools:

1. In about:config, set the "fission.autostart"
2. Restart the browser

You can file DevTools Fission related bug in Bugzilla, here.

Fission Compatibility

Panels

Summary of known issues related to DevTools panels.

Accessibility

The Accessibility panel is fully compatible with Fission.

Application

• M3 Service Workers coming from remote frames are not displayed (bug 1473257).

Performance

• M2 New Fission compatible Performance panel will be enabled (by default) at the end of October.

Inspector

• M2 Basic Highlighters (bug 1623667, bug 1572654)
• M3 Less used Highlighters: Grid, shape, path, fonts, geometry, CSS animations (bug 1568827)
• M3 Search (bug 1568880)
• M3 Eydropper (bug 1568831)

Console

• M2 Display messages and evaluate (bug 1663706)

Network

• M2 Display HTTP requests (bug 1663523, bug 1662736)
• M3 Commands: Block, Reload, Resend (bug 1667370, bug 1594726, bug 1594728)

Debugger

• M2 Early breakpoints
• M3 Service workers
• M3 Special breakpoints (DOM, XHR, Event, etc.)

Style Editor

Compatible with Fission, but there is some remaining work.

Storage

• M2 Show data coming from remote frames (bug 1644192)

Memory

• M3 Memory usage of remote frames is not displayed.

DOM

• M3 Objects coming from remote frames are not displayed.

Miscellaneous Features

Screenshot

• Screenshot doesn't work with remote frames (bug 1568833)

Service Workers

• Support for Service Workers is not not compatible with Fission.