> how to navigate around the complexity of this extension.

Do not enable "expert mode".

> It takes approximately 1.7 seconds to delete one single "dupes".

If it takes more than milliseconds (in average) to delete a bookmark, something is wrong on your system. It might be running out of memory. A more frequent cause for big latencies is that another tool is interfering, for instance another bookmark extension.

> Extention doesn't scan ALL your bookmarks (across different folders and subfolders) at once

This is incorrect. The name (path) of bookmarks is completely ignored for detecting duplicates (if expert mode is disabled).

> Even then, it's not detecting duplicate urls within the same folder (most of the time).

Two bookmarks are considered identical if their URL is *exactly* the same string. Only in expert mode, you can configure different rules, but this requires that you specify very precisely what you want to consider matching.

> It's overly complex and needs to be simplified

Specifying different rules than identical strings for URLs *is* a very complex problem and can find unexpected dupes especially for apparently simple rules. This lies in the nature of things. That's why "expert mode" is usually not recommended (unless you really understand regular expressions and carefully read the instructions).

The extension does what you tell it to: If you mark all and then press remove all marked it will of course remove all. (Why is "mark all" an option: There are dozens of marking options for selecting all but one in certain groups of dupes, and "mark all" is the one where you need to do the (de-)selection manually, typically one in each group.)

If you removed too many bookmarks by mistake, it is normally not a problem: firefox keeps a copy of previous bookmarks. Just go to "Bookmarks -> Manage Bookmarks" and then under "Import and Backup -> Restore ->" there will pop up a list of automatic bookmark backups from which you can restore one.