1869495 - webextension debugging: breakpoint not hit after switching frame

Status: NEW

(DevTools :: Debugger, defect, P3)

Description

[Julian Descottes [:jdescottes]]

Found while testing backward compat issues for 122, but also reproduces locally.

STRs:

• install https://addons.mozilla.org/en-US/firefox/addon/devtools-highlighter/
• open a tab on https://www.wikipedia.org/
• open devtools, select the "highlighter" devtools addon panel
• open another tab on about:debugging
• inspect the "devtools-highlighter" webextension
• (note: sometimes I don't get the iframe button at this step, repeat until you get it, maybe another bug?)
• open the debugger, select the source devtools/panel/devtools-panel.js
• set a breakpoint at the beginning of findAndHighlight (eg L43 let query = inputEl.value.trim();)
• go back to your wikipedia tab, try to type something in the "Search query" field of the devtools-highlighter webextension
• (here breakpoint should be consistently hit)
• go back to the webextension toolbox, and change the frame to devtools/panel/panel.html
• try to hit the breakpoint again

The breakpoint doesn't seem to work anymore.