ESMification of mobile-config-firefox

Mozilla has removed ChromeUtils.import in favor of ChromeUtils.importESModule for JS modules. We need to update any occurence because the next ESR is released to avoid breakages.

Example:

- Cu.import("resource://gre/modules/FileUtils.jsm")
+ const { FileUtils } = ChromeUtils.importESModule("resource://gre/modules/FileUtils.sys.mjs");

Migration documentation: https://docs.google.com/document/d/1cpzIK-BdP7u6RJSar-Z955GV--2Rj8V4x2vl34m36Go/edit?tab=t.0

assigned to @dannycolin

changed milestone to %NLnet: Enhancing current build and distribution process

Good catch! @ollieparanoid : As this leads to error messages on every launch with 136+, this should be adressed rather sooner than later.

In my limited testing, the change @dannycolin outlined causes no issues with ESR 128. Maybe the change could even be added to !69 ?

I hope to find the time for a few MRs to make current Firefox work better with m-c-f, but don't wait for that.

@1peter10 I already started a local patch that loads either a .jsm or .sys.mjs file based on the Firefox version so it should work on 128 and the next ESR. This is needed because not every module were ported to ESM when 128 got released.

I'll keep it in a separate patch so we keep things clear (one patch one fix) and I don't mind if I need to rebase my work because something got merged in the meantime.

mentioned in merge request !73 (merged)

mentioned in issue #101 (closed)

mentioned in commit 1peter10/mobile-config-firefox@3aef51ad

Thanks all! I guess this can be closed now that !73 (merged) was merged?

closed