The Firefox Change short label box method is as follows:
The first option is to install the tab mix extension to change the maximum size in the TAB Mix option-> appearance settings-tab width box. The recommended setting value is 100.
The second option is: in the Firefox installation directory in the Chrome directory, find the Toolkit.jar file (in fact, a ZIP format compressed file), unzip it, in the Contentglobalbindings directory, Locate the Tabbrowser.xml file, edit the file, look for "250" (there are two), change to 100, and save as a plain text file. The entire file is then packaged into a zip file, renamed to Toolkit.jar, overwriting the original file. (Note: To modify the original file is a certain risk, please do a backup.)