criticablog

ソフトウェアエンジニアがニッチな情報を書きます。

get rid of “you've launched an older version of firefox” after crash in Safe Mode

  1. I updated Firefox from (67.0+build2-0ubuntu0.18.04.1) to (67.0.1+build1-0ubuntu0.18.04.1).
  2. Firefox crashed three times in a row.
  3. I launched Firefox in safe mode but it crashed too.
  4. Firefox begun to refuse to run saying "you've launched an older version of firefox",

    Using an older version of Firefox can corrupt bookmarks and browsing history already saved to an existing Firefox profile. To protect your information, create a new profile for this installation of Firefox.

    This isn't in my case.

  5. compatibility.ini in my profile folder was
    [Compatibility]
    LastVersion=Safe Mode
    LastOSABI=Linux_x86_64-gcc3
    LastPlatformDir=/usr/lib/firefox
    LastAppDir=/usr/lib/firefox/browser
  6. I removed the line LastVersion=Safe Mode.
  7. I launched Firefox. It opened tabs successfully.
  8. compatibility.ini changed to
    [Compatibility]
    LastVersion=67.0.1_20190530055249/20190530055249
    LastOSABI=Linux_x86_64-gcc3
    LastPlatformDir=/usr/lib/firefox
    LastAppDir=/usr/lib/firefox/browser