A litle update upto firefox v146

[chelovechishko]

Actually, i worked with current Firefox files from web and not specifically 146, but, as using such version, chose such number.
It is not so easy to update fully all files, so i did not add all new, and delete all outdated, sorry.
Pocket, and Charset menu are no more.

Fix #103

Some files with html ids:

https://hg-edge.mozilla.org/mozilla-central/file/tip/browser/base/content/browser-context.inc
https://hg-edge.mozilla.org/mozilla-central/file/tip/browser/base/content/appmenu-viewcache.inc.xhtml
https://hg-edge.mozilla.org/mozilla-central/file/tip/browser/base/content/browser-menubar.inc
https://hg-edge.mozilla.org/mozilla-central/file/tip/browser/base/content/main-popupset.inc.xhtml