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  Find where the start up page is set in Firefox

Recently I encountered a weird behavior where a strange webpage showing up every time when I launched my Firefox. The first thought came into my mind is that my homepage of Firefox had been tampered. It might be changed because some software changed my browser settings to promote something. So the next immediate thing I went to check was to see my Firefox browser settings. To my surprise, the homepage setting was not touched. It would still open the Momentum screen which would display some beaut...

   WINDOWS,FIREFOX,HOMEPAGE,STARTUP PAGE,HAO123     2021-10-02 02:28:53

  Why Math.min() > Math.max() is true in JavaScript

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   JAVASCRIPT,MATH.MIN(),MATH.MAX(),COMPARISON     2022-05-02 05:27:07

  Why (offset, limit) is slow in database select?

Starting from a problem Five years ago when I was working at Tencent, I found that MySQL request speed was very slow in the pagination scenario. With only 100,000 data, a select query on a single machine took about 2-3 seconds. I asked my mentor why, and he asked in return, "In an indexing scenario, what is the time complexity to get the nth largest number in MySQL?" The pursuit of the answer Confirming the scenario Assuming there is an index on the "status" column, a query like "select * from t...

   SLOW,LIMIT,OFFSET,MYSQL     2023-03-12 05:21:02

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