Script to detect this
```
import yaml
import glob

yaml_file = open("mots.yaml", 'r')
yaml_content = yaml.load(yaml_file)
yaml_content = yaml_content['modules']
dirs = []

for key in yaml_content:
    if "includes" in key:
        if key['includes'] is not None:
            dirs = dirs + key['includes']
    if "submodules" in key:
        for key2 in key["submodules"]:
            if "includes" in key2:
                dirs = dirs + key2['includes']


print(dirs)
for d in dirs:
    d=d.replace("/**/*", "")
    if not glob.glob(d):
        print(d + " doesn't exist")
```

Differential Revision: https://phabricator.services.mozilla.com/D161513

Put test setup calls in a add_setup task and add
an assertion to ensure the localized extension
name is not falsy.

Differential Revision: https://phabricator.services.mozilla.com/D161420

Differential Revision: https://phabricator.services.mozilla.com/D161418

Differential Revision: https://phabricator.services.mozilla.com/D161462

FontFaceSetWorkerImpl::GetURLExtraData should generally not return a
null pointer, but if it failed to initialize because the worker was
shutdown during FontFaceSetWorkerImpl initialization, then it may never
be created. This patch ensures we check for this race and handle it
appropriately.

Differential Revision: https://phabricator.services.mozilla.com/D161476

Bug 1797766 - Do not declare IDBTypedCursor::mTransaction as const. r=dom-storage-reviewers,edenchuang,asuth

Differential Revision: https://phabricator.services.mozilla.com/D161439

Differential Revision: https://phabricator.services.mozilla.com/D160556

Bug 1642138: Improve integration with the macOS-level Window menu handling to unlock built-in OS functionality such as tiling of windows. r=mstange

Differential Revision: https://phabricator.services.mozilla.com/D159723

Bug 1798863 - Adjust test expectation for color_quads' unexpect passes from bug 1792285. r=gfx-reviewers,lsalzman

Differential Revision: https://phabricator.services.mozilla.com/D161495

There shouldn't be any circular dependency that requires putting definitions in
FrameChildList.h/cpp.

Differential Revision: https://phabricator.services.mozilla.com/D161426

Differential Revision: https://phabricator.services.mozilla.com/D161496

Differential Revision: https://phabricator.services.mozilla.com/D161486

el -> 82c760a4ee3e5a50b82b4bb19906d64d9d55a4f8
gn -> 868480b07347a2e4d56416e4afe40e15d9e29a50
lo -> b735fdbc521df4d004838f99163000ef0fc3e06e
sat -> fc7446267cc75380dae1943e61f5af1c5305f4b5
tg -> 7788dff808a127e1f89b561c937e6ea4254ea5e4

Differential Revision: https://phabricator.services.mozilla.com/D158888

Differential Revision: https://phabricator.services.mozilla.com/D160046

Bug 1798212 - Replace defineModuleGetter in Integration.sys.mjs with a ES version. r=settings-reviewers,mossop

Differential Revision: https://phabricator.services.mozilla.com/D161014

Bug 1798212 - Convert consumers of downloads code to ES modules. r=mak,geckoview-reviewers,extension-reviewers,settings-reviewers,credential-management-reviewers,sgalich,mconley,m_kato

Differential Revision: https://phabricator.services.mozilla.com/D161013

Differential Revision: https://phabricator.services.mozilla.com/D161012

Differential Revision: https://phabricator.services.mozilla.com/D161324

Bug 1510561 - Part 15: Apply `plugin:mozilla/valid-jsdoc` to `taskcluster/docker/periodic-updates`. r=Standard8

Depends on D161389

Differential Revision: https://phabricator.services.mozilla.com/D161390

Depends on D161388

Differential Revision: https://phabricator.services.mozilla.com/D161389

Differential Revision: https://phabricator.services.mozilla.com/D161491

Differential Revision: https://phabricator.services.mozilla.com/D161493

Differential Revision: https://phabricator.services.mozilla.com/D159151

The Atomic class supports operations such as |&=| that perform atomic updates
on shared memory that are correct when performed concurrently with other such
updates. This is unnecessary for the mark bitmap and results in sub-optimal
code generation.

Instead, updates can be done with separate read and write operations.

Differential Revision: https://phabricator.services.mozilla.com/D161473

Differential Revision: https://phabricator.services.mozilla.com/D161485

Backed out changeset 44cb21194dc0 (bug 1799435) for causing multiple resist fingerprint related failures. CLOSED TREE

If the user has a lot of bookmarks, there's a point in time where we're
computing the overflow menu arrow position, but we still haven't removed
the bookmark items from the toolbar.

This causes a wrong offset to be computed, because -moz-fit-content
computes a very large width to fit all the bookmarks.

In general, -moz-fit-content can cause stuff to overflow the browser
window (this didn't happen before modern flexbox because XUL didn't
respect min-width so aggressively). This comes from bug 993299 and I
believe we could get rid of it.

At least I don't think it has an effect on actual window width anymore,
because the ConvertsToLength() check doesn't pass here:

  https://searchfox.org/mozilla-central/rev/3c194fa1d6f339036d2ec9516bd310c6ad612859/layout/generic/nsContainerFrame.cpp#819-821

This is true at least since we switched to <html> root for
browser.xhtml.

Differential Revision: https://phabricator.services.mozilla.com/D161453

Bug 1799327 - Ensure cached hashtables used by gfxFont::CheckForFeaturesInvolvingSpace are initialized atomically. r=gfx-reviewers,lsalzman

Differential Revision: https://phabricator.services.mozilla.com/D161434

Depends on D161341

Differential Revision: https://phabricator.services.mozilla.com/D161342

Differential Revision: https://phabricator.services.mozilla.com/D161341

This addresses only part of it, but I think this should be
uncontroversial enough?

Differential Revision: https://phabricator.services.mozilla.com/D159277

Differential Revision: https://phabricator.services.mozilla.com/D161470

***
Bug 1762078 - Blocking SerivceWorker interception for no_cors cross-origin range request. r=dom-worker-reviewers,karlt
***
Bug 1762078 - Lint python file.  Fix video file.

Differential Revision: https://phabricator.services.mozilla.com/D159315

Differential Revision: https://phabricator.services.mozilla.com/D161447

Bug 1799454 - Update pdf.js to new version 7e5008f0ff013cc2b8f2af10db7f007e7cafe0de r=pdfjs-reviewers,marco

Differential Revision: https://phabricator.services.mozilla.com/D161456

document.write doesn't change window anymore, that behavior was tweaked years ago.

Differential Revision: https://phabricator.services.mozilla.com/D161457

Bug 1788152 - Update presentation of Recently Closed and Tab Pickup empty states r=flod,fluent-reviewers,desktop-theme-reviewers,sfoster

Differential Revision: https://phabricator.services.mozilla.com/D160545

No Bug, mozilla-central repo-update HSTS HPKP remote-settings tld-suffixes - a=repo-update r=diannaS

Differential Revision: https://phabricator.services.mozilla.com/D161446