Firefox Firefox zoom after the bizarre phenomenon

I don't know when to start (probably the first time I started using it), my Firefox browser zoom in on the weird phenomenon of narrowing

Spooky 1: After amplification

Spooky 2:

Sometimes feel the use of some posts is not high, both sides of the useless columns occupy a large area, such as Http://blog.sina.com.cn/s/blog_61fd04330102xbwl.html?tj=1

Then enlarge the page, the result will only enlarge the text, the spare parts on both sides are still not used (of course, reading mode can solve the utilization, the Reading Mode page is defective, not discussed here)

The same Web page, in Chrome and other browsers, is not the case. I have the same problem with Firefox under the Ubuntu system. I have to reload the software, reload the system, or have such a problem (the problem was discovered early, always search for the answer, thought is the software bug)

Today, after asking people, I find that other people's Firefox does not have this problem. Someone suggested I reset the browser

Https://support.mozilla.org/t5/Procedures-to-diagnose-and-fix/%E9%87%8D%E7%BD%AE-Firefox-%E9%A6%96%E9%80%89%E9 %a1%b9%e6%9d%a5%e6%8e%92%e9%99%a4%e6%95%85%e9%9a%9c%e5%92%8c%e8%a7%a3%e5%86%b3%e9%97%ae%e9%a2%98/ta-p/7289

I used the method two, renamed Prefs.js file, successfully resolved.

After analysis, I understand, do not know what has changed before the cause (user guess is config file, I do also changed). The reason to reload the software, reload the system, and Firefox under the Ubuntu system, all have this problem because of the problem of account synchronization.

To avoid this problem after the account is logged in, I canceled the preferences (hint: delete the receipt option file). Select: Yes), and then test again, no scaling problem occurred

Haha, happy.