Fixed an issue with pattern testing (#586)

Changed "<all_urls>" to optional permissions
Converted chrome.* to browser.* API in preparation for manifest v3
Dropped 'browser_style' in preparation for manifest v3
Increased minimum version to Firefox 93 (released 2021-10-05)
Updated code in preparation for manifest v3
Updated Locale Maker to v1.9
Updated module structure

Added HTTP/HTTPS permission for better iframe processing

Added recall for the last Find/Replace values & Match Case Option
Added iframe processing

Added replace support for Textarea and other editable elements