Toggling DOM Inspector on/off adds a filter entry in the logger

[uBlock-user]

STR --

• Browse to https://github.com/gorhill/uBlock and open the logger in another tab. Refresh the github tab if needed.

• Click on enable DOM Inspector button and click on it again to disable.

• @@||github.com^$ghide appears in logger.

• Now repeat step 2 in rapid succession and get spammed like below --

Firefox 98 and uBO dev build.

[gorhill]

It's because uBO adds an iframe to the page, to render its own overlay, and on the other side this causes an event that a new frame has been added and this causes an evaluation of generichide within that frame (because of match_about_blank in manifest), which is being reported to the logger. You get the same behavior if you launch the element picker. Not sure if it's fixable.

[uBlock-user]

Shall I mark this as wontfix then ?

[gorhill]

I doubt this can be fixed. Since I can also reproduce with element picker, in which the content scripts are not injected, this means there is a small window between the frame being added and the location of the frame being set to the element picker HTML, time window in which the frame is seen as a plain about:blank frame, meaning content scripts will be injected in it (because of match_about_blank in manifest), and hence reported to the logger. There is no way uBO's content script in an about:blank can tell whether the iframe is meant to be a container for the element picker (or DOM inspector overlay). But maybe further investigation can prove otherwise. I consider this a really minor issue and I don't plan to dedicate time to this.