Nylige revisjoner

minor syntax changes, and "backout" statement about snap beta

modernize, fix bad links

tighten up readme and references

minor edit, simplifying one line

minor edits

"Import data" and "Import browser data" are not capitalized in fx151+

minor edits

fix typo;please don't approve, discussion: https://github.com/thunderbird/knowledgebase-issues/issues/214

please don't approve, discussion: https://github.com/thunderbird/knowledgebase-issues/issues/214

please don't approve, discussion: https://github.com/thunderbird/knowledgebase-issues/issues/214

please don't approve, discussion: https://github.com/thunderbird/knowledgebase-issues/issues/214

adding archive note

Remove Pocket domains

Suppressed link to obsolete article and moved relevant content in Zoom section

New images, other edits (see discussion)

replaced [[Template:newtabpocketmenu]] with its content (see discussion)

slight adjustment on first section

change Thunderbird safe mode to troubleshoot mode, remove windows XP and vista, add performance profile

add backup step, update download locations